/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:05:47,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:05:47,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:05:47,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:05:47,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 04:05:47,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 04:05:47,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 04:05:47,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 04:05:47,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 04:05:47,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 04:05:47,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 04:05:47,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 04:05:47,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 04:05:47,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 04:05:47,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 04:05:47,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 04:05:47,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 04:05:47,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 04:05:47,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 04:05:47,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 04:05:47,340 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.epf [2021-06-05 04:05:47,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:05:47,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:05:47,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:05:47,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:05:47,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:05:47,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:05:47,372 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:05:47,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:05:47,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:05:47,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:05:47,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:05:47,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:05:47,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:05:47,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:05:47,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:05:47,373 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:05:47,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:05:47,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:05:47,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:05:47,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:05:47,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:05:47,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:05:47,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:05:47,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:05:47,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:05:47,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:05:47,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:05:47,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:05:47,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:05:47,375 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:05:47,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:05:47,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:05:47,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:05:47,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:05:47,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:05:47,640 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:05:47,640 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:05:47,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-06-05 04:05:47,641 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-06-05 04:05:47,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:05:47,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:05:47,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:05:47,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:05:47,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:05:47,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/1) ... [2021-06-05 04:05:47,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/1) ... [2021-06-05 04:05:47,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:05:47,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:05:47,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:05:47,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:05:47,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/1) ... [2021-06-05 04:05:47,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/1) ... [2021-06-05 04:05:47,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/1) ... [2021-06-05 04:05:47,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/1) ... [2021-06-05 04:05:47,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/1) ... [2021-06-05 04:05:47,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/1) ... [2021-06-05 04:05:47,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/1) ... [2021-06-05 04:05:47,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:05:47,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:05:47,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:05:47,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:05:47,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (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 04:05:47,791 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:05:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:05:47,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:05:47,791 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:05:47,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:05:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:05:47,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:05:47,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:05:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:05:47,792 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 04:05:48,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:05:48,042 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 04:05:48,043 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 04:05:48,043 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 04:05:48,044 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:05:48 BoogieIcfgContainer [2021-06-05 04:05:48,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:05:48,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:05:48,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:05:48,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:05:48,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:05:47" (1/2) ... [2021-06-05 04:05:48,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175d390d and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:05:48, skipping insertion in model container [2021-06-05 04:05:48,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:05:48" (2/2) ... [2021-06-05 04:05:48,049 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-06-05 04:05:48,052 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:05:48,052 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:05:48,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:05:48,053 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:05:48,076 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:05:48,088 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:05:48,100 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:05:48,100 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:05:48,100 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:05:48,100 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:05:48,100 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:05:48,100 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:05:48,100 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:05:48,100 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:05:48,105 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 04:05:48,111 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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 04:05:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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 04:05:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 04:05:48,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:48,115 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:48,115 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash -551954567, now seen corresponding path program 1 times [2021-06-05 04:05:48,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:48,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116206387] [2021-06-05 04:05:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,201 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 04:05:48,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:48,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116206387] [2021-06-05 04:05:48,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116206387] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:05:48,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:05:48,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 04:05:48,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117968354] [2021-06-05 04:05:48,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:05:48,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:05:48,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:05:48,215 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:48,228 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 04:05:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:05:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 04:05:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:48,234 INFO L225 Difference]: With dead ends: 22 [2021-06-05 04:05:48,234 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 04:05:48,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:05:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 04:05:48,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 04:05:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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 04:05:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 04:05:48,253 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 04:05:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:48,253 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 04:05:48,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,254 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 04:05:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:05:48,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:48,255 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:48,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:05:48,257 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:48,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1013287513, now seen corresponding path program 1 times [2021-06-05 04:05:48,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:48,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158574160] [2021-06-05 04:05:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,293 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 04:05:48,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158574160] [2021-06-05 04:05:48,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158574160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133303519] [2021-06-05 04:05:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:05:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 04:05:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:48,370 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 04:05:48,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133303519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:48,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:48,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 04:05:48,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113290819] [2021-06-05 04:05:48,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:05:48,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:48,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:05:48,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:05:48,372 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:48,399 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 04:05:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:05:48,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:05:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:48,400 INFO L225 Difference]: With dead ends: 28 [2021-06-05 04:05:48,400 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 04:05:48,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:05:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 04:05:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 04:05:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 04:05:48,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 04:05:48,404 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 04:05:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:48,404 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 04:05:48,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 04:05:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:05:48,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:48,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:48,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 04:05:48,613 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash 70002620, now seen corresponding path program 1 times [2021-06-05 04:05:48,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:48,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246329214] [2021-06-05 04:05:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,654 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 04:05:48,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:48,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246329214] [2021-06-05 04:05:48,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246329214] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:05:48,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:05:48,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:05:48,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834629759] [2021-06-05 04:05:48,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:05:48,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:05:48,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:05:48,657 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:48,685 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 04:05:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:05:48,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:05:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:48,688 INFO L225 Difference]: With dead ends: 22 [2021-06-05 04:05:48,688 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 04:05:48,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:05:48,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 04:05:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 04:05:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 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 04:05:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 04:05:48,691 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 04:05:48,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:48,691 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 04:05:48,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,691 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 04:05:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:05:48,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:48,692 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:48,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:05:48,692 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:48,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1649223530, now seen corresponding path program 2 times [2021-06-05 04:05:48,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:48,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372963234] [2021-06-05 04:05:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,723 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 04:05:48,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:48,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372963234] [2021-06-05 04:05:48,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372963234] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:05:48,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:05:48,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:05:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109420091] [2021-06-05 04:05:48,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:05:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:05:48,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:05:48,726 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:48,743 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 04:05:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:05:48,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:05:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:48,745 INFO L225 Difference]: With dead ends: 20 [2021-06-05 04:05:48,745 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 04:05:48,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:05:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 04:05:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 04:05:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 04:05:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 04:05:48,750 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 04:05:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:48,750 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 04:05:48,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 04:05:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:05:48,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:48,751 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:48,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:05:48,751 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1346416818, now seen corresponding path program 1 times [2021-06-05 04:05:48,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:48,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925511889] [2021-06-05 04:05:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,794 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 04:05:48,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:48,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925511889] [2021-06-05 04:05:48,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925511889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:48,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161465287] [2021-06-05 04:05:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:05:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:05:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:48,850 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 04:05:48,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161465287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:48,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:48,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 04:05:48,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526739303] [2021-06-05 04:05:48,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:05:48,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:48,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:05:48,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:05:48,852 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:48,867 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 04:05:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:05:48,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:05:48,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:48,870 INFO L225 Difference]: With dead ends: 24 [2021-06-05 04:05:48,870 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 04:05:48,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:05:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 04:05:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 04:05:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 04:05:48,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 04:05:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:48,872 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 04:05:48,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 04:05:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:05:48,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:48,873 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:49,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:49,085 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1989220860, now seen corresponding path program 2 times [2021-06-05 04:05:49,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:49,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680651526] [2021-06-05 04:05:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:49,129 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 04:05:49,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:49,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680651526] [2021-06-05 04:05:49,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680651526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:49,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317696760] [2021-06-05 04:05:49,154 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 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 04:05:49,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:49,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:49,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:05:49,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:49,248 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 04:05:49,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317696760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:49,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:49,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 04:05:49,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716371330] [2021-06-05 04:05:49,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:05:49,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:49,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:05:49,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:05:49,249 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:49,270 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-06-05 04:05:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:05:49,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:05:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:49,272 INFO L225 Difference]: With dead ends: 28 [2021-06-05 04:05:49,272 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 04:05:49,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:05:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 04:05:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 04:05:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-06-05 04:05:49,276 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-06-05 04:05:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:49,276 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-06-05 04:05:49,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-06-05 04:05:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:05:49,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:49,277 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:49,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:49,477 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:49,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1980193522, now seen corresponding path program 3 times [2021-06-05 04:05:49,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:49,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918917812] [2021-06-05 04:05:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:49,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:49,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918917812] [2021-06-05 04:05:49,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918917812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:49,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55133456] [2021-06-05 04:05:49,529 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 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 04:05:49,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:05:49,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:49,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:05:49,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:49,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55133456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:49,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:49,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:05:49,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299486376] [2021-06-05 04:05:49,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:05:49,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:49,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:05:49,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:05:49,629 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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 04:05:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:49,669 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-06-05 04:05:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:05:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 13 [2021-06-05 04:05:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:49,669 INFO L225 Difference]: With dead ends: 32 [2021-06-05 04:05:49,669 INFO L226 Difference]: Without dead ends: 32 [2021-06-05 04:05:49,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:05:49,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-06-05 04:05:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-06-05 04:05:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-06-05 04:05:49,672 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-06-05 04:05:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:49,672 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-06-05 04:05:49,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 04:05:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-06-05 04:05:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:05:49,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:49,673 INFO L521 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:49,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:49,889 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:49,889 INFO L82 PathProgramCache]: Analyzing trace with hash -477987780, now seen corresponding path program 4 times [2021-06-05 04:05:49,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:49,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85675943] [2021-06-05 04:05:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:49,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:49,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85675943] [2021-06-05 04:05:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85675943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:49,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831259464] [2021-06-05 04:05:49,943 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:05:49,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:49,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:49,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:05:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:50,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831259464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:50,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:50,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 04:05:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340356172] [2021-06-05 04:05:50,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:50,029 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:50,057 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-06-05 04:05:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:05:50,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:05:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:50,059 INFO L225 Difference]: With dead ends: 36 [2021-06-05 04:05:50,060 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 04:05:50,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 04:05:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 04:05:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-05 04:05:50,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-06-05 04:05:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:50,062 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-05 04:05:50,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-05 04:05:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:05:50,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:50,063 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:50,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:50,281 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:50,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1154250034, now seen corresponding path program 5 times [2021-06-05 04:05:50,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:50,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695645936] [2021-06-05 04:05:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:50,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:50,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695645936] [2021-06-05 04:05:50,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695645936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:50,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596713861] [2021-06-05 04:05:50,319 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 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 04:05:50,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:05:50,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:50,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:05:50,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:50,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:50,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:05:50,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:50,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:50,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:50,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:05:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:50,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596713861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:50,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:50,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 04:05:50,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57458268] [2021-06-05 04:05:50,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:50,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:50,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:50,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:50,624 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) 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 04:05:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:50,737 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-06-05 04:05:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) 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 15 [2021-06-05 04:05:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:50,738 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:05:50,738 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:05:50,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:05:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-06-05 04:05:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-06-05 04:05:50,742 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-06-05 04:05:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:50,742 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-06-05 04:05:50,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) 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 04:05:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-06-05 04:05:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:05:50,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:50,743 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:50,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:50,945 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:50,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1304076458, now seen corresponding path program 6 times [2021-06-05 04:05:50,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:50,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154112273] [2021-06-05 04:05:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:50,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:50,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154112273] [2021-06-05 04:05:50,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154112273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:50,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445744034] [2021-06-05 04:05:50,983 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 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 04:05:51,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:05:51,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:51,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:05:51,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:51,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:51,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:05:51,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:51,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:51,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:51,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:05:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:51,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445744034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:51,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:51,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 04:05:51,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274869989] [2021-06-05 04:05:51,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:51,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:51,323 INFO L87 Difference]: Start difference. First operand 49 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:51,388 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-06-05 04:05:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:51,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-05 04:05:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:51,390 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:05:51,390 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:05:51,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:05:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-06-05 04:05:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-06-05 04:05:51,406 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-06-05 04:05:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:51,406 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-06-05 04:05:51,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-06-05 04:05:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:05:51,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:51,407 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:51,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:51,608 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash 930031036, now seen corresponding path program 7 times [2021-06-05 04:05:51,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:51,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573940779] [2021-06-05 04:05:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:51,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:51,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573940779] [2021-06-05 04:05:51,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573940779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:51,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905109191] [2021-06-05 04:05:51,648 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 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 04:05:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:51,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:05:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:51,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:51,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:05:51,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:51,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:51,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:51,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:05:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:51,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905109191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:51,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:51,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 04:05:51,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407186755] [2021-06-05 04:05:51,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:51,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:51,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:51,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:51,862 INFO L87 Difference]: Start difference. First operand 57 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:51,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:51,924 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-06-05 04:05:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-05 04:05:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:51,925 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:05:51,925 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:05:51,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:05:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-06-05 04:05:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-06-05 04:05:51,935 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-06-05 04:05:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:51,935 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-06-05 04:05:51,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-06-05 04:05:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:05:51,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:51,936 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:52,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 04:05:52,153 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1467886614, now seen corresponding path program 8 times [2021-06-05 04:05:52,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:52,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355835001] [2021-06-05 04:05:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:52,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:52,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355835001] [2021-06-05 04:05:52,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355835001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:52,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375123630] [2021-06-05 04:05:52,190 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 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 04:05:52,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:52,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:05:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:52,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:52,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:05:52,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:52,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:52,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:52,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:05:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375123630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:52,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:52,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 04:05:52,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506879026] [2021-06-05 04:05:52,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:52,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:52,402 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:52,463 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-06-05 04:05:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-05 04:05:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:52,464 INFO L225 Difference]: With dead ends: 124 [2021-06-05 04:05:52,464 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:05:52,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:05:52,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-06-05 04:05:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-06-05 04:05:52,472 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-06-05 04:05:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:52,473 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-06-05 04:05:52,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-06-05 04:05:52,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:05:52,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:52,476 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:52,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:52,694 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:52,694 INFO L82 PathProgramCache]: Analyzing trace with hash 961540348, now seen corresponding path program 9 times [2021-06-05 04:05:52,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:52,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395645089] [2021-06-05 04:05:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:52,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:52,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395645089] [2021-06-05 04:05:52,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395645089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:52,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573350265] [2021-06-05 04:05:52,741 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 04:05:52,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:05:52,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:05:52,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:52,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:52,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:05:52,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:52,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:52,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:52,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:05:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:52,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573350265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:52,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:52,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 04:05:52,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195362237] [2021-06-05 04:05:52,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:52,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:52,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:52,923 INFO L87 Difference]: Start difference. First operand 76 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:53,012 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-06-05 04:05:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:53,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-05 04:05:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:53,013 INFO L225 Difference]: With dead ends: 136 [2021-06-05 04:05:53,014 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 04:05:53,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 04:05:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-06-05 04:05:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-06-05 04:05:53,017 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-06-05 04:05:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:53,017 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-06-05 04:05:53,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-06-05 04:05:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:05:53,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:53,017 INFO L521 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:53,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 04:05:53,233 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:53,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1850292010, now seen corresponding path program 10 times [2021-06-05 04:05:53,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:53,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753519683] [2021-06-05 04:05:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:53,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:53,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753519683] [2021-06-05 04:05:53,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753519683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:53,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497547519] [2021-06-05 04:05:53,267 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 04:05:53,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:53,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:05:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:53,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:53,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-06-05 04:05:53,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:53,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:53,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:53,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-06-05 04:05:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:53,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497547519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:53,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:53,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 04:05:53,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593394908] [2021-06-05 04:05:53,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:53,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:53,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:53,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:53,457 INFO L87 Difference]: Start difference. First operand 87 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:53,539 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-06-05 04:05:53,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:53,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 15 [2021-06-05 04:05:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:53,540 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:05:53,540 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:05:53,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:53,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:05:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-06-05 04:05:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-06-05 04:05:53,543 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-06-05 04:05:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:53,543 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-06-05 04:05:53,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:05:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-06-05 04:05:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:53,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:53,543 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:53,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:53,757 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:53,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:53,757 INFO L82 PathProgramCache]: Analyzing trace with hash -643543428, now seen corresponding path program 11 times [2021-06-05 04:05:53,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:53,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806089822] [2021-06-05 04:05:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:53,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:53,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806089822] [2021-06-05 04:05:53,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806089822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:53,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178591511] [2021-06-05 04:05:53,801 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) [2021-06-05 04:05:53,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:05:53,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:53,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:53,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178591511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:53,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:53,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:05:53,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659655984] [2021-06-05 04:05:53,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:05:53,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:53,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:05:53,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:05:53,866 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:53,952 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2021-06-05 04:05:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:05:53,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:53,953 INFO L225 Difference]: With dead ends: 171 [2021-06-05 04:05:53,953 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 04:05:53,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:05:53,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 04:05:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-06-05 04:05:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.843137254901961) internal successors, (290), 102 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 290 transitions. [2021-06-05 04:05:53,958 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 290 transitions. Word has length 16 [2021-06-05 04:05:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:53,958 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 290 transitions. [2021-06-05 04:05:53,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 290 transitions. [2021-06-05 04:05:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:53,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:53,959 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:54,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 04:05:54,169 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:54,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1421287673, now seen corresponding path program 12 times [2021-06-05 04:05:54,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:54,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078634616] [2021-06-05 04:05:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:54,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078634616] [2021-06-05 04:05:54,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078634616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483320303] [2021-06-05 04:05:54,213 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) [2021-06-05 04:05:54,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:05:54,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:54,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:54,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483320303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:54,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:05:54,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378147325] [2021-06-05 04:05:54,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:05:54,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:54,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:05:54,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:05:54,280 INFO L87 Difference]: Start difference. First operand 103 states and 290 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:54,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:54,413 INFO L93 Difference]: Finished difference Result 207 states and 463 transitions. [2021-06-05 04:05:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:05:54,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:54,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:54,414 INFO L225 Difference]: With dead ends: 207 [2021-06-05 04:05:54,414 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:05:54,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:05:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2021-06-05 04:05:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-06-05 04:05:54,418 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-06-05 04:05:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:54,418 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-06-05 04:05:54,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-06-05 04:05:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:54,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:54,419 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:54,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 04:05:54,634 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:54,635 INFO L82 PathProgramCache]: Analyzing trace with hash 946722458, now seen corresponding path program 13 times [2021-06-05 04:05:54,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:54,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964335047] [2021-06-05 04:05:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:54,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964335047] [2021-06-05 04:05:54,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964335047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778007457] [2021-06-05 04:05:54,673 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 04:05:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:54,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:54,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778007457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:54,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:54,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707653801] [2021-06-05 04:05:54,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:54,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:54,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:54,724 INFO L87 Difference]: Start difference. First operand 125 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:54,812 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-06-05 04:05:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:54,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:54,815 INFO L225 Difference]: With dead ends: 152 [2021-06-05 04:05:54,815 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 04:05:54,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 04:05:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-06-05 04:05:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-06-05 04:05:54,819 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-06-05 04:05:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:54,819 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-06-05 04:05:54,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-06-05 04:05:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:54,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:54,819 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:55,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:55,037 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:55,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1869141191, now seen corresponding path program 14 times [2021-06-05 04:05:55,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:55,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523849758] [2021-06-05 04:05:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:55,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:55,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523849758] [2021-06-05 04:05:55,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523849758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075910131] [2021-06-05 04:05:55,087 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 04:05:55,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:55,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:55,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:55,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075910131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:55,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:55,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130191380] [2021-06-05 04:05:55,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:55,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:55,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:55,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:55,156 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:55,191 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-06-05 04:05:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:05:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:55,193 INFO L225 Difference]: With dead ends: 214 [2021-06-05 04:05:55,193 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 04:05:55,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:05:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 04:05:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-06-05 04:05:55,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-06-05 04:05:55,196 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-06-05 04:05:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:55,196 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-06-05 04:05:55,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-06-05 04:05:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:55,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:55,197 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:55,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 04:05:55,405 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1440737642, now seen corresponding path program 15 times [2021-06-05 04:05:55,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:55,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847365989] [2021-06-05 04:05:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:55,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:55,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847365989] [2021-06-05 04:05:55,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847365989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099232504] [2021-06-05 04:05:55,445 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 04:05:55,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:05:55,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:55,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:55,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:55,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099232504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:55,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:55,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496353854] [2021-06-05 04:05:55,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:55,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:55,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:55,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:55,511 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:55,561 INFO L93 Difference]: Finished difference Result 211 states and 472 transitions. [2021-06-05 04:05:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:05:55,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:55,562 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:05:55,562 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:05:55,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:55,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:05:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 132. [2021-06-05 04:05:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8091603053435112) internal successors, (368), 131 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 368 transitions. [2021-06-05 04:05:55,566 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 368 transitions. Word has length 16 [2021-06-05 04:05:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:55,566 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 368 transitions. [2021-06-05 04:05:55,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 368 transitions. [2021-06-05 04:05:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:55,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:55,567 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:55,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:55,773 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:55,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1770939521, now seen corresponding path program 16 times [2021-06-05 04:05:55,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:55,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54703448] [2021-06-05 04:05:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:55,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:55,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54703448] [2021-06-05 04:05:55,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54703448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881934153] [2021-06-05 04:05:55,812 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 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 04:05:55,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:55,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:55,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:55,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:55,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881934153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:55,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:55,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392337684] [2021-06-05 04:05:55,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:55,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:55,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:55,867 INFO L87 Difference]: Start difference. First operand 132 states and 368 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:55,958 INFO L93 Difference]: Finished difference Result 225 states and 509 transitions. [2021-06-05 04:05:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:55,959 INFO L225 Difference]: With dead ends: 225 [2021-06-05 04:05:55,959 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 04:05:55,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 04:05:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-06-05 04:05:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-06-05 04:05:55,963 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-06-05 04:05:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:55,963 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-06-05 04:05:55,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-06-05 04:05:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:55,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:55,964 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:56,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:56,177 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1114137344, now seen corresponding path program 17 times [2021-06-05 04:05:56,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:56,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126490379] [2021-06-05 04:05:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:56,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:56,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126490379] [2021-06-05 04:05:56,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126490379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:56,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521319412] [2021-06-05 04:05:56,219 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 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 04:05:56,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:05:56,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:56,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:56,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:56,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521319412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:56,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:56,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:56,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906804687] [2021-06-05 04:05:56,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:56,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:56,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:56,290 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:56,363 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-06-05 04:05:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:56,364 INFO L225 Difference]: With dead ends: 206 [2021-06-05 04:05:56,364 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:05:56,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:05:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-06-05 04:05:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-06-05 04:05:56,368 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-06-05 04:05:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:56,368 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-06-05 04:05:56,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-06-05 04:05:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:56,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:56,368 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:56,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:56,585 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash -191718611, now seen corresponding path program 18 times [2021-06-05 04:05:56,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:56,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264348781] [2021-06-05 04:05:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:56,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:56,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264348781] [2021-06-05 04:05:56,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264348781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:56,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533049674] [2021-06-05 04:05:56,626 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 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 04:05:56,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:05:56,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:56,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:56,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533049674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:56,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:56,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:56,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747376075] [2021-06-05 04:05:56,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:56,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:56,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:56,682 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:56,722 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-06-05 04:05:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:05:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:56,723 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:05:56,723 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 04:05:56,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:05:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 04:05:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-06-05 04:05:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-06-05 04:05:56,726 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-06-05 04:05:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:56,726 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-06-05 04:05:56,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,726 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-06-05 04:05:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:56,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:56,727 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:56,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:56,942 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:56,943 INFO L82 PathProgramCache]: Analyzing trace with hash 596475964, now seen corresponding path program 19 times [2021-06-05 04:05:56,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:56,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452120528] [2021-06-05 04:05:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:56,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:56,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452120528] [2021-06-05 04:05:56,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452120528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:56,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113166189] [2021-06-05 04:05:56,979 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 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 04:05:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:57,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:57,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113166189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:57,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:57,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:05:57,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243980464] [2021-06-05 04:05:57,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:05:57,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:57,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:05:57,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:05:57,040 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:57,127 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-06-05 04:05:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:57,128 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:57,128 INFO L225 Difference]: With dead ends: 181 [2021-06-05 04:05:57,128 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 04:05:57,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:05:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 04:05:57,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-06-05 04:05:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-06-05 04:05:57,131 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-06-05 04:05:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:57,131 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-06-05 04:05:57,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-06-05 04:05:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:57,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:57,132 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:57,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 04:05:57,345 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:57,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:57,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1920765945, now seen corresponding path program 20 times [2021-06-05 04:05:57,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:57,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382516843] [2021-06-05 04:05:57,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:57,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:57,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382516843] [2021-06-05 04:05:57,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382516843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:57,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682853574] [2021-06-05 04:05:57,383 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 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 04:05:57,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:57,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:57,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:57,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682853574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:57,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:57,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:05:57,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643797279] [2021-06-05 04:05:57,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:05:57,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:05:57,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:05:57,444 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:57,519 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-06-05 04:05:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:05:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:57,520 INFO L225 Difference]: With dead ends: 248 [2021-06-05 04:05:57,520 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 04:05:57,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:57,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 04:05:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-06-05 04:05:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-06-05 04:05:57,523 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-06-05 04:05:57,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:57,523 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-06-05 04:05:57,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-06-05 04:05:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:57,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:57,524 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:57,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 04:05:57,740 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:57,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1978593220, now seen corresponding path program 21 times [2021-06-05 04:05:57,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:57,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558937129] [2021-06-05 04:05:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:57,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:57,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558937129] [2021-06-05 04:05:57,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558937129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:57,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444379740] [2021-06-05 04:05:57,774 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 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 04:05:57,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:05:57,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:57,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:57,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444379740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:57,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:57,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:57,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120869297] [2021-06-05 04:05:57,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:57,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:57,828 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:57,889 INFO L93 Difference]: Finished difference Result 230 states and 525 transitions. [2021-06-05 04:05:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:05:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:57,890 INFO L225 Difference]: With dead ends: 230 [2021-06-05 04:05:57,890 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 04:05:57,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 04:05:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2021-06-05 04:05:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8413793103448275) internal successors, (412), 145 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 412 transitions. [2021-06-05 04:05:57,893 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 412 transitions. Word has length 16 [2021-06-05 04:05:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:57,893 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 412 transitions. [2021-06-05 04:05:57,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 412 transitions. [2021-06-05 04:05:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:57,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:57,894 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:58,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:58,105 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1233083943, now seen corresponding path program 22 times [2021-06-05 04:05:58,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:58,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615092615] [2021-06-05 04:05:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:58,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:58,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615092615] [2021-06-05 04:05:58,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615092615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:58,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574812994] [2021-06-05 04:05:58,147 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 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 04:05:58,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:58,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:58,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:58,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574812994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:58,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:58,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:58,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015466348] [2021-06-05 04:05:58,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:58,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:58,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:58,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:58,197 INFO L87 Difference]: Start difference. First operand 146 states and 412 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:58,275 INFO L93 Difference]: Finished difference Result 240 states and 554 transitions. [2021-06-05 04:05:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:58,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:58,276 INFO L225 Difference]: With dead ends: 240 [2021-06-05 04:05:58,276 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 04:05:58,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:58,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 04:05:58,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2021-06-05 04:05:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-06-05 04:05:58,280 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-06-05 04:05:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:58,280 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-06-05 04:05:58,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-06-05 04:05:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:58,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:58,280 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:58,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 04:05:58,496 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash -576281766, now seen corresponding path program 23 times [2021-06-05 04:05:58,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:58,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104710299] [2021-06-05 04:05:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:58,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:58,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104710299] [2021-06-05 04:05:58,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104710299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:58,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198522517] [2021-06-05 04:05:58,531 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 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 04:05:58,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:05:58,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:58,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:58,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:58,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198522517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:58,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:58,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233016611] [2021-06-05 04:05:58,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:58,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:58,581 INFO L87 Difference]: Start difference. First operand 155 states and 444 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:58,656 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-06-05 04:05:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:58,657 INFO L225 Difference]: With dead ends: 229 [2021-06-05 04:05:58,657 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 04:05:58,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:58,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 04:05:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-06-05 04:05:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-06-05 04:05:58,661 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-06-05 04:05:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:58,661 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-06-05 04:05:58,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-06-05 04:05:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:58,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:58,661 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:58,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:58,877 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:58,877 INFO L82 PathProgramCache]: Analyzing trace with hash 346136967, now seen corresponding path program 24 times [2021-06-05 04:05:58,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:58,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551443907] [2021-06-05 04:05:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:58,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:58,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551443907] [2021-06-05 04:05:58,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551443907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:58,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101645784] [2021-06-05 04:05:58,909 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 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 04:05:58,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:05:58,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:58,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:59,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101645784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:59,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:05:59,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265171397] [2021-06-05 04:05:59,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:05:59,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:59,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:05:59,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:05:59,011 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:59,049 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-06-05 04:05:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:05:59,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:59,050 INFO L225 Difference]: With dead ends: 244 [2021-06-05 04:05:59,050 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 04:05:59,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:05:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 04:05:59,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-06-05 04:05:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-06-05 04:05:59,053 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-06-05 04:05:59,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:59,053 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-06-05 04:05:59,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,053 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-06-05 04:05:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:59,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:59,054 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:59,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 04:05:59,269 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:59,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1134331542, now seen corresponding path program 25 times [2021-06-05 04:05:59,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:59,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421909928] [2021-06-05 04:05:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:59,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:59,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421909928] [2021-06-05 04:05:59,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421909928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178499599] [2021-06-05 04:05:59,303 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 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 04:05:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:59,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:59,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:59,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178499599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:59,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:05:59,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964619522] [2021-06-05 04:05:59,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:05:59,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:59,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:05:59,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:05:59,361 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:59,468 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-06-05 04:05:59,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:59,469 INFO L225 Difference]: With dead ends: 234 [2021-06-05 04:05:59,469 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 04:05:59,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:05:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 04:05:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-06-05 04:05:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-06-05 04:05:59,473 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-06-05 04:05:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:59,473 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-06-05 04:05:59,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-06-05 04:05:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:59,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:59,474 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:59,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:59,689 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:59,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1382910367, now seen corresponding path program 26 times [2021-06-05 04:05:59,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:59,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365573286] [2021-06-05 04:05:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:59,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:59,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365573286] [2021-06-05 04:05:59,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365573286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748935215] [2021-06-05 04:05:59,723 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 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 04:05:59,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:59,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:59,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:05:59,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:59,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748935215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:59,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:05:59,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473259689] [2021-06-05 04:05:59,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:05:59,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:05:59,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:05:59,780 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:59,840 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-06-05 04:05:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:05:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:05:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:59,841 INFO L225 Difference]: With dead ends: 257 [2021-06-05 04:05:59,841 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 04:05:59,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 04:05:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-06-05 04:05:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-06-05 04:05:59,844 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-06-05 04:05:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:59,844 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-06-05 04:05:59,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-06-05 04:05:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:05:59,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:59,845 INFO L521 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:00,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:00,053 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:00,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1671230758, now seen corresponding path program 27 times [2021-06-05 04:06:00,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:00,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790877537] [2021-06-05 04:06:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:00,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:00,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790877537] [2021-06-05 04:06:00,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790877537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:00,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265319091] [2021-06-05 04:06:00,100 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 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 04:06:00,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:06:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:00,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:00,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265319091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:00,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:00,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 04:06:00,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148588885] [2021-06-05 04:06:00,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:00,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:00,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:00,206 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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 04:06:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:00,448 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-06-05 04:06:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:06:00,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 16 [2021-06-05 04:06:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:00,449 INFO L225 Difference]: With dead ends: 265 [2021-06-05 04:06:00,449 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:06:00,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:06:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:06:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-06-05 04:06:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-06-05 04:06:00,452 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-06-05 04:06:00,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:00,453 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-06-05 04:06:00,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 04:06:00,453 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-06-05 04:06:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:00,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:00,453 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:00,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:00,670 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash 851197127, now seen corresponding path program 28 times [2021-06-05 04:06:00,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:00,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544047154] [2021-06-05 04:06:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:00,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:00,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544047154] [2021-06-05 04:06:00,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544047154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:00,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870361782] [2021-06-05 04:06:00,708 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 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 04:06:00,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:00,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:00,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:00,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870361782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:00,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:00,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:06:00,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70412667] [2021-06-05 04:06:00,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:00,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:00,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:00,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:00,763 INFO L87 Difference]: Start difference. First operand 202 states and 567 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:00,841 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-06-05 04:06:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:06:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:00,843 INFO L225 Difference]: With dead ends: 353 [2021-06-05 04:06:00,843 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 04:06:00,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 04:06:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-06-05 04:06:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-06-05 04:06:00,847 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-06-05 04:06:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:00,847 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-06-05 04:06:00,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-06-05 04:06:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:00,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:00,847 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:01,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:01,063 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:01,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1739430209, now seen corresponding path program 29 times [2021-06-05 04:06:01,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:01,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587607078] [2021-06-05 04:06:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:01,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:01,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587607078] [2021-06-05 04:06:01,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587607078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:01,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312659812] [2021-06-05 04:06:01,097 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 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 04:06:01,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:06:01,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:01,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:01,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:01,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312659812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:01,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:01,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:06:01,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94796633] [2021-06-05 04:06:01,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:06:01,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:01,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:06:01,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:06:01,164 INFO L87 Difference]: Start difference. First operand 215 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:01,232 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-06-05 04:06:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:06:01,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:01,234 INFO L225 Difference]: With dead ends: 342 [2021-06-05 04:06:01,234 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 04:06:01,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 04:06:01,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-06-05 04:06:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 04:06:01,238 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 04:06:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:01,238 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 04:06:01,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 04:06:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:01,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:01,238 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:01,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:01,453 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash -160209299, now seen corresponding path program 30 times [2021-06-05 04:06:01,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:01,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045022629] [2021-06-05 04:06:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:01,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:01,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045022629] [2021-06-05 04:06:01,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045022629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:01,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532470346] [2021-06-05 04:06:01,486 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 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 04:06:01,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:06:01,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:01,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:01,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:01,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532470346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:01,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:01,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:06:01,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518949882] [2021-06-05 04:06:01,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:06:01,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:01,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:06:01,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:06:01,544 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:01,575 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-06-05 04:06:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:06:01,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:01,576 INFO L225 Difference]: With dead ends: 348 [2021-06-05 04:06:01,576 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 04:06:01,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 04:06:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-06-05 04:06:01,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 04:06:01,580 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 04:06:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:01,580 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 04:06:01,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 04:06:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:01,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:01,581 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:01,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 04:06:01,797 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1889256633, now seen corresponding path program 31 times [2021-06-05 04:06:01,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:01,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207972699] [2021-06-05 04:06:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:01,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:01,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207972699] [2021-06-05 04:06:01,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207972699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:01,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116925012] [2021-06-05 04:06:01,826 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 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 04:06:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:01,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:01,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:01,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116925012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:01,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:01,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:06:01,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630553154] [2021-06-05 04:06:01,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:01,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:01,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:01,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:01,885 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:01,941 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-06-05 04:06:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:01,953 INFO L225 Difference]: With dead ends: 362 [2021-06-05 04:06:01,953 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 04:06:01,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 04:06:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-06-05 04:06:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 04:06:01,957 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 04:06:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:01,957 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 04:06:01,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 04:06:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:01,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:01,958 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:02,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 04:06:02,173 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:02,173 INFO L82 PathProgramCache]: Analyzing trace with hash 344850861, now seen corresponding path program 32 times [2021-06-05 04:06:02,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:02,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146675808] [2021-06-05 04:06:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:02,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:02,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146675808] [2021-06-05 04:06:02,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146675808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:02,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049760567] [2021-06-05 04:06:02,205 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 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 04:06:02,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:02,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:02,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049760567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:02,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:02,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:06:02,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827215484] [2021-06-05 04:06:02,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:02,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:02,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:02,273 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:02,335 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-06-05 04:06:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:02,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:02,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:02,337 INFO L225 Difference]: With dead ends: 346 [2021-06-05 04:06:02,337 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 04:06:02,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 04:06:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-06-05 04:06:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-06-05 04:06:02,341 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-06-05 04:06:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:02,341 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-06-05 04:06:02,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-06-05 04:06:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:02,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:02,341 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:02,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 04:06:02,557 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:02,557 INFO L82 PathProgramCache]: Analyzing trace with hash 882706439, now seen corresponding path program 33 times [2021-06-05 04:06:02,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:02,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440897272] [2021-06-05 04:06:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:02,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:02,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440897272] [2021-06-05 04:06:02,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440897272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:02,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973777340] [2021-06-05 04:06:02,594 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 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 04:06:02,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:06:02,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:02,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:02,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:02,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973777340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:02,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:02,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:06:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048172301] [2021-06-05 04:06:02,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:02,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:02,656 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:02,768 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-06-05 04:06:02,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:02,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:02,770 INFO L225 Difference]: With dead ends: 402 [2021-06-05 04:06:02,770 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 04:06:02,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 04:06:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-06-05 04:06:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-06-05 04:06:02,774 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-06-05 04:06:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:02,774 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-06-05 04:06:02,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-06-05 04:06:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:02,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:02,775 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:02,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 04:06:02,989 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash -256295271, now seen corresponding path program 34 times [2021-06-05 04:06:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:02,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517769733] [2021-06-05 04:06:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:03,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:03,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517769733] [2021-06-05 04:06:03,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517769733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:03,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047567234] [2021-06-05 04:06:03,027 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 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 04:06:03,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:03,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:03,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047567234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:03,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:03,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:06:03,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876706094] [2021-06-05 04:06:03,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:06:03,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:03,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:06:03,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:06:03,081 INFO L87 Difference]: Start difference. First operand 254 states and 742 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:03,163 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-06-05 04:06:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:06:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:03,164 INFO L225 Difference]: With dead ends: 396 [2021-06-05 04:06:03,164 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 04:06:03,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:03,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 04:06:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-06-05 04:06:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 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 04:06:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-06-05 04:06:03,169 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-06-05 04:06:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:03,169 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-06-05 04:06:03,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-06-05 04:06:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:03,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:03,170 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:03,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:03,385 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:03,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1322925639, now seen corresponding path program 35 times [2021-06-05 04:06:03,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:03,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652315681] [2021-06-05 04:06:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:03,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:03,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652315681] [2021-06-05 04:06:03,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652315681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:03,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541187547] [2021-06-05 04:06:03,423 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 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 04:06:03,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:06:03,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:03,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:03,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:03,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541187547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:03,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:03,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:06:03,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598232349] [2021-06-05 04:06:03,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:06:03,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:03,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:06:03,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:06:03,473 INFO L87 Difference]: Start difference. First operand 292 states and 868 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:03,520 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-06-05 04:06:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:06:03,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:03,521 INFO L225 Difference]: With dead ends: 394 [2021-06-05 04:06:03,521 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 04:06:03,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:03,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 04:06:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-06-05 04:06:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-06-05 04:06:03,525 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-06-05 04:06:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:03,525 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-06-05 04:06:03,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-06-05 04:06:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:03,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:03,526 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:03,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 04:06:03,742 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:03,742 INFO L82 PathProgramCache]: Analyzing trace with hash -406121695, now seen corresponding path program 36 times [2021-06-05 04:06:03,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:03,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231730305] [2021-06-05 04:06:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:03,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:03,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231730305] [2021-06-05 04:06:03,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231730305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:03,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680429730] [2021-06-05 04:06:03,777 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 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 04:06:03,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:06:03,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:03,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:03,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:03,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680429730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:03,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:03,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:06:03,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38163123] [2021-06-05 04:06:03,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:03,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:03,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:03,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:03,832 INFO L87 Difference]: Start difference. First operand 290 states and 860 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:03,887 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-06-05 04:06:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:03,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:03,888 INFO L225 Difference]: With dead ends: 402 [2021-06-05 04:06:03,889 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 04:06:03,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:03,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 04:06:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-06-05 04:06:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 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 04:06:03,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-05 04:06:03,893 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-05 04:06:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:03,893 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-05 04:06:03,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,893 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-05 04:06:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:03,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:03,893 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:04,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 04:06:04,109 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:04,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:04,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1827985799, now seen corresponding path program 37 times [2021-06-05 04:06:04,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:04,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902470261] [2021-06-05 04:06:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:04,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:04,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902470261] [2021-06-05 04:06:04,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902470261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238981134] [2021-06-05 04:06:04,140 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 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 04:06:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:04,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:04,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238981134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:04,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:06:04,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117523119] [2021-06-05 04:06:04,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:04,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:04,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:04,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:04,203 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:04,274 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-06-05 04:06:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:04,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:04,275 INFO L225 Difference]: With dead ends: 379 [2021-06-05 04:06:04,275 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 04:06:04,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 04:06:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-06-05 04:06:04,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 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 04:06:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-05 04:06:04,280 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-05 04:06:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:04,280 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-05 04:06:04,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:04,280 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-05 04:06:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:04,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:04,280 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:04,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:04,496 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:04,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1929125919, now seen corresponding path program 38 times [2021-06-05 04:06:04,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:04,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943473757] [2021-06-05 04:06:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:04,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:04,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943473757] [2021-06-05 04:06:04,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943473757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367558180] [2021-06-05 04:06:04,527 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 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 04:06:04,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:04,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:04,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:04,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:04,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367558180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:04,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:06:04,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322980444] [2021-06-05 04:06:04,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:04,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:04,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:04,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:04,584 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:04,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:04,679 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-06-05 04:06:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:06:04,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:04,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:04,680 INFO L225 Difference]: With dead ends: 381 [2021-06-05 04:06:04,680 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 04:06:04,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:06:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 04:06:04,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-06-05 04:06:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 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 04:06:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-06-05 04:06:04,684 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-06-05 04:06:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:04,684 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-06-05 04:06:04,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-06-05 04:06:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:04,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:04,685 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:04,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:04,897 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1859495111, now seen corresponding path program 39 times [2021-06-05 04:06:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:04,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785805412] [2021-06-05 04:06:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:04,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:04,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785805412] [2021-06-05 04:06:04,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785805412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992823508] [2021-06-05 04:06:04,936 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 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 04:06:04,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:06:04,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:04,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:04,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992823508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:04,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:06:04,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720647725] [2021-06-05 04:06:04,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:04,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:04,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:04,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:04,988 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:05,121 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-06-05 04:06:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:06:05,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:05,122 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:06:05,122 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:06:05,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:06:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:06:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-06-05 04:06:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 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 04:06:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-05 04:06:05,127 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-06-05 04:06:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:05,127 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-05 04:06:05,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-05 04:06:05,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:05,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:05,127 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:05,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:05,341 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1523752449, now seen corresponding path program 40 times [2021-06-05 04:06:05,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:05,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106466508] [2021-06-05 04:06:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:05,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:05,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106466508] [2021-06-05 04:06:05,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106466508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:05,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230696353] [2021-06-05 04:06:05,397 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:06:05,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:05,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:05,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:05,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:05,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230696353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:05,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:05,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 04:06:05,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095902111] [2021-06-05 04:06:05,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:05,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:05,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:05,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:05,469 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:05,567 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-06-05 04:06:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:06:05,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:05,568 INFO L225 Difference]: With dead ends: 446 [2021-06-05 04:06:05,568 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 04:06:05,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 04:06:05,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-06-05 04:06:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-06-05 04:06:05,573 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-06-05 04:06:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:05,573 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-06-05 04:06:05,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,573 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-06-05 04:06:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:05,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:05,574 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:05,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:05,785 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash 55468461, now seen corresponding path program 41 times [2021-06-05 04:06:05,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:05,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674735103] [2021-06-05 04:06:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:05,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:05,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674735103] [2021-06-05 04:06:05,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674735103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:05,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12063769] [2021-06-05 04:06:05,823 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 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 04:06:05,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:06:05,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:05,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:05,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:05,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12063769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:05,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:05,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 04:06:05,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453334141] [2021-06-05 04:06:05,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:05,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:05,882 INFO L87 Difference]: Start difference. First operand 344 states and 1030 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:05,946 INFO L93 Difference]: Finished difference Result 432 states and 1125 transitions. [2021-06-05 04:06:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:06:05,946 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:05,947 INFO L225 Difference]: With dead ends: 432 [2021-06-05 04:06:05,947 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 04:06:05,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 04:06:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 342. [2021-06-05 04:06:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-06-05 04:06:05,952 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-06-05 04:06:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:05,952 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-06-05 04:06:05,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-06-05 04:06:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:05,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:05,953 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:06,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:06,166 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:06,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1673578873, now seen corresponding path program 42 times [2021-06-05 04:06:06,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:06,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312938383] [2021-06-05 04:06:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:06,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:06,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312938383] [2021-06-05 04:06:06,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312938383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:06,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087879625] [2021-06-05 04:06:06,213 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 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 04:06:06,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:06:06,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:06,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:06,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:06,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087879625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:06,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:06,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:06:06,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664114564] [2021-06-05 04:06:06,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:06,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:06,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:06,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:06,284 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:06,404 INFO L93 Difference]: Finished difference Result 438 states and 1134 transitions. [2021-06-05 04:06:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:06:06,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:06,405 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:06:06,406 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:06:06,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:06:06,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 338. [2021-06-05 04:06:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:06,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-06-05 04:06:06,410 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-06-05 04:06:06,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:06,410 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-06-05 04:06:06,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:06,410 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-06-05 04:06:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:06,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:06,411 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:06,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 04:06:06,621 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash 560528621, now seen corresponding path program 43 times [2021-06-05 04:06:06,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:06,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077328269] [2021-06-05 04:06:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:06,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:06,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077328269] [2021-06-05 04:06:06,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077328269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:06,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949164649] [2021-06-05 04:06:06,663 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 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 04:06:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:06,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:06,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:06,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949164649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:06,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:06,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:06:06,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180412831] [2021-06-05 04:06:06,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:06,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:06,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:06,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:06,725 INFO L87 Difference]: Start difference. First operand 338 states and 1004 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:06,862 INFO L93 Difference]: Finished difference Result 417 states and 1108 transitions. [2021-06-05 04:06:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:06:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:06,864 INFO L225 Difference]: With dead ends: 417 [2021-06-05 04:06:06,864 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 04:06:06,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:06:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 04:06:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 332. [2021-06-05 04:06:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-06-05 04:06:06,868 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-06-05 04:06:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:06,868 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-06-05 04:06:06,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-06-05 04:06:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:06,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:06,869 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:07,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 04:06:07,077 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:07,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:07,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1098384199, now seen corresponding path program 44 times [2021-06-05 04:06:07,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:07,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213340973] [2021-06-05 04:06:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:07,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:07,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213340973] [2021-06-05 04:06:07,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213340973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:07,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067269921] [2021-06-05 04:06:07,154 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:06:07,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:07,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:07,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:07,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:07,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067269921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:07,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:07,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:06:07,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398073802] [2021-06-05 04:06:07,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:07,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:07,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:07,216 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:07,352 INFO L93 Difference]: Finished difference Result 404 states and 1108 transitions. [2021-06-05 04:06:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:06:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:07,355 INFO L225 Difference]: With dead ends: 404 [2021-06-05 04:06:07,355 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 04:06:07,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:06:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 04:06:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 325. [2021-06-05 04:06:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-06-05 04:06:07,359 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-06-05 04:06:07,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:07,360 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-06-05 04:06:07,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-06-05 04:06:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:07,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:07,360 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:07,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:07,576 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:07,577 INFO L82 PathProgramCache]: Analyzing trace with hash 592037933, now seen corresponding path program 45 times [2021-06-05 04:06:07,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:07,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276780773] [2021-06-05 04:06:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:07,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:07,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276780773] [2021-06-05 04:06:07,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276780773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:07,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093016897] [2021-06-05 04:06:07,616 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 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 04:06:07,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:06:07,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:07,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:07,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:07,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093016897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:07,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:07,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:06:07,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8735536] [2021-06-05 04:06:07,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:07,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:07,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:07,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:07,674 INFO L87 Difference]: Start difference. First operand 325 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:07,800 INFO L93 Difference]: Finished difference Result 408 states and 1118 transitions. [2021-06-05 04:06:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:06:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:06:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:07,802 INFO L225 Difference]: With dead ends: 408 [2021-06-05 04:06:07,802 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 04:06:07,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 04:06:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 320. [2021-06-05 04:06:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-06-05 04:06:07,806 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-06-05 04:06:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:07,806 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-06-05 04:06:07,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-06-05 04:06:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:06:07,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:07,807 INFO L521 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:08,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 04:06:08,011 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:08,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2075172871, now seen corresponding path program 46 times [2021-06-05 04:06:08,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:08,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932118917] [2021-06-05 04:06:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:08,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:08,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932118917] [2021-06-05 04:06:08,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932118917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:08,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531303431] [2021-06-05 04:06:08,061 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 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 04:06:08,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:08,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:08,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:08,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531303431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:08,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:08,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:06:08,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220975745] [2021-06-05 04:06:08,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:06:08,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:06:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:06:08,124 INFO L87 Difference]: Start difference. First operand 320 states and 946 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 04:06:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:08,300 INFO L93 Difference]: Finished difference Result 465 states and 1276 transitions. [2021-06-05 04:06:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:08,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 16 [2021-06-05 04:06:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:08,302 INFO L225 Difference]: With dead ends: 465 [2021-06-05 04:06:08,302 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 04:06:08,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:06:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 04:06:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 317. [2021-06-05 04:06:08,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-06-05 04:06:08,306 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-06-05 04:06:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:08,306 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-06-05 04:06:08,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 04:06:08,306 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-06-05 04:06:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:08,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:08,307 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:08,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:08,522 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:08,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1607417494, now seen corresponding path program 47 times [2021-06-05 04:06:08,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:08,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375962035] [2021-06-05 04:06:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:08,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:08,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375962035] [2021-06-05 04:06:08,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375962035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:08,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827085814] [2021-06-05 04:06:08,555 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 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 04:06:08,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:06:08,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:08,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:08,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:08,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827085814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:08,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:08,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 04:06:08,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871818348] [2021-06-05 04:06:08,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:08,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:08,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:08,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:08,612 INFO L87 Difference]: Start difference. First operand 317 states and 946 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) 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 04:06:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:08,647 INFO L93 Difference]: Finished difference Result 414 states and 1090 transitions. [2021-06-05 04:06:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:06:08,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) 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 17 [2021-06-05 04:06:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:08,648 INFO L225 Difference]: With dead ends: 414 [2021-06-05 04:06:08,648 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:06:08,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:06:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:06:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-06-05 04:06:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-06-05 04:06:08,652 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-06-05 04:06:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:08,652 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-06-05 04:06:08,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) 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 04:06:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-06-05 04:06:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:08,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:08,653 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:08,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:08,869 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash 763155816, now seen corresponding path program 48 times [2021-06-05 04:06:08,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:08,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830520685] [2021-06-05 04:06:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:08,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:08,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830520685] [2021-06-05 04:06:08,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830520685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:08,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101823919] [2021-06-05 04:06:08,905 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 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 04:06:08,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:06:08,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:08,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:08,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101823919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:08,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:08,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 04:06:08,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513425250] [2021-06-05 04:06:08,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:08,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:08,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:08,958 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 04:06:09,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:09,035 INFO L93 Difference]: Finished difference Result 409 states and 1079 transitions. [2021-06-05 04:06:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:06:09,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 17 [2021-06-05 04:06:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:09,037 INFO L225 Difference]: With dead ends: 409 [2021-06-05 04:06:09,037 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 04:06:09,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 04:06:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-06-05 04:06:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-06-05 04:06:09,041 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-06-05 04:06:09,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:09,041 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-06-05 04:06:09,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 04:06:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-06-05 04:06:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:09,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:09,041 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:09,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:09,257 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2042406484, now seen corresponding path program 49 times [2021-06-05 04:06:09,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:09,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750497782] [2021-06-05 04:06:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:09,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:09,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750497782] [2021-06-05 04:06:09,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750497782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:09,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871180985] [2021-06-05 04:06:09,294 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 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 04:06:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:09,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:09,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:09,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871180985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:09,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:09,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:06:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818722506] [2021-06-05 04:06:09,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:09,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:09,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:09,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:09,343 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:09,429 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-06-05 04:06:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:09,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 17 [2021-06-05 04:06:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:09,434 INFO L225 Difference]: With dead ends: 414 [2021-06-05 04:06:09,434 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 04:06:09,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:06:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 04:06:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 323. [2021-06-05 04:06:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-06-05 04:06:09,438 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-06-05 04:06:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:09,438 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-06-05 04:06:09,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-06-05 04:06:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:09,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:09,439 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:09,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:09,651 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1179475432, now seen corresponding path program 50 times [2021-06-05 04:06:09,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:09,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958494461] [2021-06-05 04:06:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:09,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:09,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958494461] [2021-06-05 04:06:09,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958494461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:09,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104404402] [2021-06-05 04:06:09,693 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 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 04:06:09,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:09,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:09,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:09,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104404402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:09,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:09,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:06:09,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000819305] [2021-06-05 04:06:09,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:09,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:09,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:09,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:09,763 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:09,827 INFO L93 Difference]: Finished difference Result 367 states and 1049 transitions. [2021-06-05 04:06:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:06:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 17 [2021-06-05 04:06:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:09,828 INFO L225 Difference]: With dead ends: 367 [2021-06-05 04:06:09,828 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 04:06:09,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 04:06:09,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-06-05 04:06:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.984472049689441) internal successors, (961), 322 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 961 transitions. [2021-06-05 04:06:09,832 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 961 transitions. Word has length 17 [2021-06-05 04:06:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:09,832 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 961 transitions. [2021-06-05 04:06:09,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 961 transitions. [2021-06-05 04:06:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:09,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:09,837 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:10,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:10,053 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:10,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2021400276, now seen corresponding path program 51 times [2021-06-05 04:06:10,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:10,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875486875] [2021-06-05 04:06:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:10,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:10,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875486875] [2021-06-05 04:06:10,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875486875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220454276] [2021-06-05 04:06:10,091 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 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 04:06:10,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:06:10,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:06:10,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:10,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220454276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:10,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:06:10,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333045336] [2021-06-05 04:06:10,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:10,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:10,156 INFO L87 Difference]: Start difference. First operand 323 states and 961 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:10,225 INFO L93 Difference]: Finished difference Result 355 states and 1035 transitions. [2021-06-05 04:06:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:10,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 04:06:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:10,227 INFO L225 Difference]: With dead ends: 355 [2021-06-05 04:06:10,227 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 04:06:10,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 04:06:10,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-06-05 04:06:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:10,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-06-05 04:06:10,230 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 17 [2021-06-05 04:06:10,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:10,230 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-06-05 04:06:10,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:10,231 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-06-05 04:06:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:10,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:10,231 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:10,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:10,445 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 339960316, now seen corresponding path program 52 times [2021-06-05 04:06:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130992843] [2021-06-05 04:06:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:10,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:10,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130992843] [2021-06-05 04:06:10,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130992843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631116648] [2021-06-05 04:06:10,480 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 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 04:06:10,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:10,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:10,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:06:10,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:10,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631116648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:10,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:06:10,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626518650] [2021-06-05 04:06:10,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:06:10,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:06:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:06:10,527 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:10,562 INFO L93 Difference]: Finished difference Result 443 states and 1153 transitions. [2021-06-05 04:06:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:06:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 04:06:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:10,563 INFO L225 Difference]: With dead ends: 443 [2021-06-05 04:06:10,563 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 04:06:10,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 04:06:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-06-05 04:06:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0) internal successors, (987), 329 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 987 transitions. [2021-06-05 04:06:10,569 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 987 transitions. Word has length 17 [2021-06-05 04:06:10,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:10,570 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 987 transitions. [2021-06-05 04:06:10,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:10,570 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 987 transitions. [2021-06-05 04:06:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:10,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:10,570 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:10,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 04:06:10,773 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:10,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:10,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2080052626, now seen corresponding path program 53 times [2021-06-05 04:06:10,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:10,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280963179] [2021-06-05 04:06:10,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:10,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:10,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280963179] [2021-06-05 04:06:10,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280963179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366951495] [2021-06-05 04:06:10,807 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 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 04:06:10,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:06:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:10,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366951495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:10,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 04:06:10,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088371328] [2021-06-05 04:06:10,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:10,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:10,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:10,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:10,860 INFO L87 Difference]: Start difference. First operand 330 states and 987 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 04:06:10,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:10,901 INFO L93 Difference]: Finished difference Result 430 states and 1125 transitions. [2021-06-05 04:06:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:06:10,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 17 [2021-06-05 04:06:10,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:10,902 INFO L225 Difference]: With dead ends: 430 [2021-06-05 04:06:10,902 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 04:06:10,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 04:06:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-06-05 04:06:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9908536585365852) internal successors, (981), 328 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 981 transitions. [2021-06-05 04:06:10,906 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 981 transitions. Word has length 17 [2021-06-05 04:06:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:10,906 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 981 transitions. [2021-06-05 04:06:10,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 04:06:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 981 transitions. [2021-06-05 04:06:10,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:10,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:10,907 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:11,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 04:06:11,113 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash -504301362, now seen corresponding path program 54 times [2021-06-05 04:06:11,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:11,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171122132] [2021-06-05 04:06:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:11,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171122132] [2021-06-05 04:06:11,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171122132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052935111] [2021-06-05 04:06:11,156 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 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 04:06:11,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:06:11,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:11,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:11,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052935111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:11,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:11,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 04:06:11,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971009363] [2021-06-05 04:06:11,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:06:11,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:06:11,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:06:11,210 INFO L87 Difference]: Start difference. First operand 329 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 04:06:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:11,290 INFO L93 Difference]: Finished difference Result 428 states and 1117 transitions. [2021-06-05 04:06:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:06:11,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 17 [2021-06-05 04:06:11,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:11,292 INFO L225 Difference]: With dead ends: 428 [2021-06-05 04:06:11,292 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 04:06:11,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 04:06:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 329. [2021-06-05 04:06:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-06-05 04:06:11,296 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 17 [2021-06-05 04:06:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:11,296 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-06-05 04:06:11,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 04:06:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-06-05 04:06:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:11,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:11,296 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:11,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 04:06:11,501 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:11,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:11,501 INFO L82 PathProgramCache]: Analyzing trace with hash 985103634, now seen corresponding path program 55 times [2021-06-05 04:06:11,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:11,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055673883] [2021-06-05 04:06:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:11,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:11,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055673883] [2021-06-05 04:06:11,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055673883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:11,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321942091] [2021-06-05 04:06:11,541 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 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 04:06:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:11,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:11,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321942091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:11,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:11,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:06:11,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945733304] [2021-06-05 04:06:11,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:11,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:11,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:11,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:11,596 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:11,685 INFO L93 Difference]: Finished difference Result 433 states and 1122 transitions. [2021-06-05 04:06:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 17 [2021-06-05 04:06:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:11,687 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:06:11,687 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 04:06:11,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:06:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 04:06:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-06-05 04:06:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-06-05 04:06:11,691 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 17 [2021-06-05 04:06:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:11,691 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-06-05 04:06:11,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-06-05 04:06:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:11,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:11,692 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:11,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 04:06:11,905 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:11,905 INFO L82 PathProgramCache]: Analyzing trace with hash -87981746, now seen corresponding path program 56 times [2021-06-05 04:06:11,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:11,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323479727] [2021-06-05 04:06:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:11,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:11,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323479727] [2021-06-05 04:06:11,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323479727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:11,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251333013] [2021-06-05 04:06:11,955 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 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 04:06:11,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:11,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:11,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:12,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251333013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:12,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:12,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:06:12,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443977368] [2021-06-05 04:06:12,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:12,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:12,010 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:12,087 INFO L93 Difference]: Finished difference Result 386 states and 1084 transitions. [2021-06-05 04:06:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:06:12,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 17 [2021-06-05 04:06:12,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:12,089 INFO L225 Difference]: With dead ends: 386 [2021-06-05 04:06:12,089 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 04:06:12,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 04:06:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 329. [2021-06-05 04:06:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2021-06-05 04:06:12,093 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 17 [2021-06-05 04:06:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:12,093 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2021-06-05 04:06:12,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2021-06-05 04:06:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:12,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:12,093 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:12,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:12,301 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:12,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1006109842, now seen corresponding path program 57 times [2021-06-05 04:06:12,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:12,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651344432] [2021-06-05 04:06:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:12,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651344432] [2021-06-05 04:06:12,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651344432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:12,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647677260] [2021-06-05 04:06:12,352 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 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 04:06:12,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:06:12,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:12,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:06:12,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:12,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647677260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:12,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:12,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:06:12,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373962275] [2021-06-05 04:06:12,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:12,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:12,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:12,410 INFO L87 Difference]: Start difference. First operand 329 states and 977 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:12,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:12,482 INFO L93 Difference]: Finished difference Result 385 states and 1081 transitions. [2021-06-05 04:06:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:06:12,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 04:06:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:12,484 INFO L225 Difference]: With dead ends: 385 [2021-06-05 04:06:12,484 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 04:06:12,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 04:06:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 329. [2021-06-05 04:06:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.975609756097561) internal successors, (976), 328 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 976 transitions. [2021-06-05 04:06:12,491 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 976 transitions. Word has length 17 [2021-06-05 04:06:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:12,491 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 976 transitions. [2021-06-05 04:06:12,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 976 transitions. [2021-06-05 04:06:12,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:12,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:12,492 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:12,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 04:06:12,705 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:12,705 INFO L82 PathProgramCache]: Analyzing trace with hash 563210702, now seen corresponding path program 58 times [2021-06-05 04:06:12,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:12,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229488748] [2021-06-05 04:06:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:12,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:12,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:12,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229488748] [2021-06-05 04:06:12,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229488748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:12,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167730671] [2021-06-05 04:06:12,749 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 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 04:06:12,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:12,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:12,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:12,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167730671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:12,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:12,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:06:12,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904645635] [2021-06-05 04:06:12,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:12,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:12,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:12,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:12,815 INFO L87 Difference]: Start difference. First operand 329 states and 976 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:12,890 INFO L93 Difference]: Finished difference Result 372 states and 1066 transitions. [2021-06-05 04:06:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:12,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 17 [2021-06-05 04:06:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:12,891 INFO L225 Difference]: With dead ends: 372 [2021-06-05 04:06:12,891 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 04:06:12,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:12,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 04:06:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 329. [2021-06-05 04:06:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:12,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2021-06-05 04:06:12,896 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 17 [2021-06-05 04:06:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:12,896 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2021-06-05 04:06:12,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) 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 04:06:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2021-06-05 04:06:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:12,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:12,897 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:13,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:13,109 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:13,109 INFO L82 PathProgramCache]: Analyzing trace with hash -296506538, now seen corresponding path program 59 times [2021-06-05 04:06:13,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:13,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274878307] [2021-06-05 04:06:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:13,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:13,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274878307] [2021-06-05 04:06:13,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274878307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014929085] [2021-06-05 04:06:13,156 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 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 04:06:13,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:06:13,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:13,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:13,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:13,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014929085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:13,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-06-05 04:06:13,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759985425] [2021-06-05 04:06:13,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:06:13,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:13,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:06:13,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:06:13,217 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) 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 04:06:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:13,277 INFO L93 Difference]: Finished difference Result 518 states and 1389 transitions. [2021-06-05 04:06:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) 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 17 [2021-06-05 04:06:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:13,279 INFO L225 Difference]: With dead ends: 518 [2021-06-05 04:06:13,279 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 04:06:13,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 04:06:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 384. [2021-06-05 04:06:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-06-05 04:06:13,284 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-06-05 04:06:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:13,284 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-06-05 04:06:13,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) 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 04:06:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-06-05 04:06:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:13,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:13,285 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:13,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 04:06:13,486 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:13,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1140768216, now seen corresponding path program 60 times [2021-06-05 04:06:13,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:13,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896359455] [2021-06-05 04:06:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:13,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:13,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896359455] [2021-06-05 04:06:13,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896359455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669068537] [2021-06-05 04:06:13,532 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 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 04:06:13,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:06:13,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:13,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:06:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:13,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669068537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:13,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:06:13,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273873233] [2021-06-05 04:06:13,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:06:13,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:13,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:06:13,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:06:13,584 INFO L87 Difference]: Start difference. First operand 384 states and 1187 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:06:13,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:13,667 INFO L93 Difference]: Finished difference Result 496 states and 1356 transitions. [2021-06-05 04:06:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 17 [2021-06-05 04:06:13,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:13,668 INFO L225 Difference]: With dead ends: 496 [2021-06-05 04:06:13,668 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 04:06:13,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 04:06:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 384. [2021-06-05 04:06:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-06-05 04:06:13,673 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 17 [2021-06-05 04:06:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:13,673 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-06-05 04:06:13,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:06:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-06-05 04:06:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:13,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:13,674 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:13,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:13,885 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:13,885 INFO L82 PathProgramCache]: Analyzing trace with hash 348636780, now seen corresponding path program 61 times [2021-06-05 04:06:13,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:13,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272571472] [2021-06-05 04:06:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:13,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:13,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272571472] [2021-06-05 04:06:13,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272571472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203126574] [2021-06-05 04:06:13,931 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 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 04:06:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:13,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:13,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203126574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:13,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 04:06:13,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109958040] [2021-06-05 04:06:13,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:06:13,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:13,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:06:13,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:06:13,990 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) 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 04:06:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:14,088 INFO L93 Difference]: Finished difference Result 501 states and 1361 transitions. [2021-06-05 04:06:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:06:14,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) 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 17 [2021-06-05 04:06:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:14,092 INFO L225 Difference]: With dead ends: 501 [2021-06-05 04:06:14,092 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:06:14,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:06:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-06-05 04:06:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-06-05 04:06:14,097 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-06-05 04:06:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:14,098 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-06-05 04:06:14,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) 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 04:06:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-06-05 04:06:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:14,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:14,098 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:14,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:14,314 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:14,314 INFO L82 PathProgramCache]: Analyzing trace with hash -724448600, now seen corresponding path program 62 times [2021-06-05 04:06:14,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:14,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753628155] [2021-06-05 04:06:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:14,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:14,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753628155] [2021-06-05 04:06:14,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753628155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:14,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496182809] [2021-06-05 04:06:14,361 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 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 04:06:14,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:14,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:14,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:14,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496182809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:14,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:14,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 04:06:14,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423109261] [2021-06-05 04:06:14,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:06:14,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:06:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:06:14,429 INFO L87 Difference]: Start difference. First operand 390 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) 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 04:06:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:14,516 INFO L93 Difference]: Finished difference Result 453 states and 1323 transitions. [2021-06-05 04:06:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:14,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) 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 17 [2021-06-05 04:06:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:14,518 INFO L225 Difference]: With dead ends: 453 [2021-06-05 04:06:14,518 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 04:06:14,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 04:06:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-06-05 04:06:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-06-05 04:06:14,523 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-06-05 04:06:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:14,523 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-06-05 04:06:14,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) 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 04:06:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-06-05 04:06:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:14,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:14,523 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:14,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:14,737 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:14,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash 369642988, now seen corresponding path program 63 times [2021-06-05 04:06:14,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:14,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357866545] [2021-06-05 04:06:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:14,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:14,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357866545] [2021-06-05 04:06:14,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357866545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:14,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921494410] [2021-06-05 04:06:14,779 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 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 04:06:14,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:06:14,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:14,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:06:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:14,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921494410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:14,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:14,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 04:06:14,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805215515] [2021-06-05 04:06:14,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:06:14,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:14,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:06:14,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:06:14,840 INFO L87 Difference]: Start difference. First operand 390 states and 1206 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 04:06:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:14,925 INFO L93 Difference]: Finished difference Result 450 states and 1317 transitions. [2021-06-05 04:06:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:06:14,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 17 [2021-06-05 04:06:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:14,926 INFO L225 Difference]: With dead ends: 450 [2021-06-05 04:06:14,926 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 04:06:14,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 04:06:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-06-05 04:06:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-06-05 04:06:14,930 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-06-05 04:06:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:14,930 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-06-05 04:06:14,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 04:06:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-06-05 04:06:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:14,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:14,931 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:15,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 04:06:15,131 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:15,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:15,132 INFO L82 PathProgramCache]: Analyzing trace with hash -73256152, now seen corresponding path program 64 times [2021-06-05 04:06:15,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:15,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658991319] [2021-06-05 04:06:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:15,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658991319] [2021-06-05 04:06:15,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658991319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367036548] [2021-06-05 04:06:15,177 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 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 04:06:15,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:15,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:15,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367036548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:15,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:15,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 04:06:15,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931739994] [2021-06-05 04:06:15,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:06:15,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:15,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:06:15,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:06:15,234 INFO L87 Difference]: Start difference. First operand 390 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) 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 04:06:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:15,315 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-06-05 04:06:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:06:15,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) 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 17 [2021-06-05 04:06:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:15,316 INFO L225 Difference]: With dead ends: 444 [2021-06-05 04:06:15,316 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 04:06:15,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 04:06:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-06-05 04:06:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.095115681233933) internal successors, (1204), 389 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1204 transitions. [2021-06-05 04:06:15,321 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1204 transitions. Word has length 17 [2021-06-05 04:06:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:15,321 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1204 transitions. [2021-06-05 04:06:15,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) 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 04:06:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1204 transitions. [2021-06-05 04:06:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:06:15,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:15,321 INFO L521 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:15,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 04:06:15,525 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:15,525 INFO L82 PathProgramCache]: Analyzing trace with hash -918227604, now seen corresponding path program 65 times [2021-06-05 04:06:15,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:15,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611915433] [2021-06-05 04:06:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:15,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611915433] [2021-06-05 04:06:15,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611915433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:15,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509898837] [2021-06-05 04:06:15,575 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 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 04:06:15,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:06:15,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:15,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:06:15,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:15,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509898837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:15,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:15,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 04:06:15,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781947676] [2021-06-05 04:06:15,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:15,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:15,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:15,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:15,638 INFO L87 Difference]: Start difference. First operand 390 states and 1204 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) 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 04:06:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:15,723 INFO L93 Difference]: Finished difference Result 435 states and 1298 transitions. [2021-06-05 04:06:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:06:15,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 17 [2021-06-05 04:06:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:15,724 INFO L225 Difference]: With dead ends: 435 [2021-06-05 04:06:15,724 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 04:06:15,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 04:06:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-06-05 04:06:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0925449871465296) internal successors, (1203), 389 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1203 transitions. [2021-06-05 04:06:15,729 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1203 transitions. Word has length 17 [2021-06-05 04:06:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:15,729 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1203 transitions. [2021-06-05 04:06:15,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) 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 04:06:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1203 transitions. [2021-06-05 04:06:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:06:15,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:15,730 INFO L521 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:15,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 04:06:15,944 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1606475449, now seen corresponding path program 66 times [2021-06-05 04:06:15,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:15,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703279135] [2021-06-05 04:06:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:06:16,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:16,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703279135] [2021-06-05 04:06:16,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703279135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:16,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157589514] [2021-06-05 04:06:16,033 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 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 04:06:16,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:06:16,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:06:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:06:16,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157589514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:16,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:16,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:06:16,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891250234] [2021-06-05 04:06:16,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:16,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:16,143 INFO L87 Difference]: Start difference. First operand 390 states and 1203 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 04:06:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:16,227 INFO L93 Difference]: Finished difference Result 721 states and 2125 transitions. [2021-06-05 04:06:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:06:16,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 04:06:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:16,228 INFO L225 Difference]: With dead ends: 721 [2021-06-05 04:06:16,228 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 04:06:16,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:16,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 04:06:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-06-05 04:06:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.0423162583518932) internal successors, (1366), 449 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 04:06:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1366 transitions. [2021-06-05 04:06:16,234 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1366 transitions. Word has length 18 [2021-06-05 04:06:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:16,234 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1366 transitions. [2021-06-05 04:06:16,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 04:06:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1366 transitions. [2021-06-05 04:06:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:06:16,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:16,235 INFO L521 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:16,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 04:06:16,441 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash 79861465, now seen corresponding path program 67 times [2021-06-05 04:06:16,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:16,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238376830] [2021-06-05 04:06:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:06:16,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:16,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238376830] [2021-06-05 04:06:16,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238376830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:16,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762786700] [2021-06-05 04:06:16,533 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 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 04:06:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:16,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:06:16,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:06:16,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762786700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:16,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:16,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:06:16,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30620789] [2021-06-05 04:06:16,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:16,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:16,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:16,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:16,651 INFO L87 Difference]: Start difference. First operand 450 states and 1366 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 04:06:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:16,757 INFO L93 Difference]: Finished difference Result 819 states and 2401 transitions. [2021-06-05 04:06:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:06:16,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 19 [2021-06-05 04:06:16,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:16,758 INFO L225 Difference]: With dead ends: 819 [2021-06-05 04:06:16,758 INFO L226 Difference]: Without dead ends: 819 [2021-06-05 04:06:16,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-05 04:06:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-06-05 04:06:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0018867924528303) internal successors, (1591), 530 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1591 transitions. [2021-06-05 04:06:16,765 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1591 transitions. Word has length 19 [2021-06-05 04:06:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:16,765 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1591 transitions. [2021-06-05 04:06:16,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 04:06:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1591 transitions. [2021-06-05 04:06:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:06:16,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:16,766 INFO L521 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:16,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 04:06:16,981 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:16,981 INFO L82 PathProgramCache]: Analyzing trace with hash 816698247, now seen corresponding path program 68 times [2021-06-05 04:06:16,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:16,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850234564] [2021-06-05 04:06:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:06:17,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:17,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850234564] [2021-06-05 04:06:17,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850234564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:17,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061586053] [2021-06-05 04:06:17,075 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 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 04:06:17,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:17,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:17,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:06:17,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:06:17,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061586053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:17,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:17,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:06:17,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057017263] [2021-06-05 04:06:17,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:06:17,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:17,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:06:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:17,205 INFO L87 Difference]: Start difference. First operand 531 states and 1591 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:17,367 INFO L93 Difference]: Finished difference Result 928 states and 2706 transitions. [2021-06-05 04:06:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:06:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:17,369 INFO L225 Difference]: With dead ends: 928 [2021-06-05 04:06:17,369 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 04:06:17,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:06:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 04:06:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-06-05 04:06:17,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9791666666666665) internal successors, (1859), 624 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1859 transitions. [2021-06-05 04:06:17,377 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1859 transitions. Word has length 20 [2021-06-05 04:06:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:17,377 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1859 transitions. [2021-06-05 04:06:17,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1859 transitions. [2021-06-05 04:06:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:06:17,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:17,378 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:17,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:17,581 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:17,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2111165287, now seen corresponding path program 69 times [2021-06-05 04:06:17,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:17,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369706909] [2021-06-05 04:06:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:17,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:17,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369706909] [2021-06-05 04:06:17,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369706909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:17,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129049103] [2021-06-05 04:06:17,648 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 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 04:06:17,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:06:17,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:06:17,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:18,033 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:06:18,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:06:18,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:06:19,262 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 276 [2021-06-05 04:06:19,488 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 373 [2021-06-05 04:06:19,763 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 405 [2021-06-05 04:06:21,038 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 320 [2021-06-05 04:06:21,547 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-06-05 04:06:22,055 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 549 [2021-06-05 04:06:22,685 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 564 [2021-06-05 04:06:23,658 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 640 [2021-06-05 04:06:24,100 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 490 [2021-06-05 04:06:24,758 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 448 [2021-06-05 04:06:24,931 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 285 [2021-06-05 04:06:25,117 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 281 [2021-06-05 04:06:25,261 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 236 [2021-06-05 04:06:26,186 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 278 [2021-06-05 04:06:26,345 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 284 [2021-06-05 04:06:26,576 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 334 [2021-06-05 04:06:27,396 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 272 [2021-06-05 04:06:27,849 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 493 [2021-06-05 04:06:28,352 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 526 [2021-06-05 04:06:28,575 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 267 [2021-06-05 04:06:28,735 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 280 [2021-06-05 04:06:28,922 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 226 [2021-06-05 04:06:29,644 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 227 [2021-06-05 04:06:29,818 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 280 [2021-06-05 04:06:31,105 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 302 [2021-06-05 04:06:31,604 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 455 [2021-06-05 04:06:32,222 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 539 [2021-06-05 04:06:33,477 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 1029 DAG size of output: 839 [2021-06-05 04:06:33,613 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 247 [2021-06-05 04:06:33,737 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 248 [2021-06-05 04:06:34,986 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 277 [2021-06-05 04:06:35,148 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 286 [2021-06-05 04:06:35,443 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 404 [2021-06-05 04:06:36,259 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 242 [2021-06-05 04:06:37,407 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 285 [2021-06-05 04:06:37,650 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 331 [2021-06-05 04:06:38,094 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 435 [2021-06-05 04:06:38,856 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 642 [2021-06-05 04:06:39,798 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 842 DAG size of output: 701 [2021-06-05 04:06:41,905 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 1449 DAG size of output: 1159 [2021-06-05 04:06:42,026 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 276 [2021-06-05 04:06:42,232 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 282 [2021-06-05 04:06:42,388 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 237 [2021-06-05 04:06:43,890 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 336 [2021-06-05 04:06:44,125 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 386 [2021-06-05 04:06:44,551 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 432 [2021-06-05 04:06:44,999 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 457 [2021-06-05 04:06:45,521 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 493 [2021-06-05 04:06:45,719 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 245 [2021-06-05 04:06:47,247 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 282 [2021-06-05 04:06:47,453 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 290 [2021-06-05 04:06:47,766 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 384 [2021-06-05 04:06:48,214 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 459 [2021-06-05 04:06:48,771 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 565 DAG size of output: 485 [2021-06-05 04:06:49,927 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 963 DAG size of output: 759 [2021-06-05 04:06:51,100 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 235 [2021-06-05 04:06:51,237 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 267 [2021-06-05 04:06:51,450 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 342 [2021-06-05 04:06:51,711 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 364 [2021-06-05 04:06:52,699 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 309 [2021-06-05 04:06:53,389 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 247 [2021-06-05 04:06:53,547 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 289 [2021-06-05 04:06:53,872 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 460 [2021-06-05 04:06:54,278 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 471 [2021-06-05 04:06:54,781 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 517 [2021-06-05 04:06:55,733 WARN L205 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 770 [2021-06-05 04:06:57,036 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 976 DAG size of output: 843 [2021-06-05 04:06:59,264 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 1672 DAG size of output: 1269 [2021-06-05 04:07:03,950 WARN L205 SmtUtils]: Spent 4.68 s on a formula simplification. DAG size of input: 2766 DAG size of output: 2078 [2021-06-05 04:07:09,384 WARN L205 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 2914 DAG size of output: 2167 [2021-06-05 04:07:15,685 WARN L205 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 3096 DAG size of output: 2337 [2021-06-05 04:07:23,082 WARN L205 SmtUtils]: Spent 7.38 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-06-05 04:07:30,484 WARN L205 SmtUtils]: Spent 7.39 s on a formula simplification. DAG size of input: 3384 DAG size of output: 2564 [2021-06-05 04:07:38,715 WARN L205 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 3395 DAG size of output: 2575 [2021-06-05 04:07:39,010 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 2571 [2021-06-05 04:07:46,274 WARN L205 SmtUtils]: Spent 7.25 s on a formula simplification. DAG size of input: 2573 DAG size of output: 2793 [2021-06-05 04:07:50,163 WARN L205 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 1761 DAG size of output: 2006 [2021-06-05 04:07:53,619 WARN L205 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 1624 DAG size of output: 1786 [2021-06-05 04:07:53,733 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 1251 [2021-06-05 04:07:54,011 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 1071 [2021-06-05 04:07:54,730 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 266 [2021-06-05 04:07:55,268 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 228 [2021-06-05 04:07:56,079 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 750 DAG size of output: 510 [2021-06-05 04:07:56,751 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 813 [2021-06-05 04:07:57,614 WARN L205 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 1214 DAG size of output: 842 [2021-06-05 04:07:58,615 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 1258 DAG size of output: 879 [2021-06-05 04:07:59,933 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1418 DAG size of output: 990 [2021-06-05 04:08:00,685 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 683 [2021-06-05 04:08:01,299 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 240 [2021-06-05 04:08:02,737 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 365 [2021-06-05 04:08:03,093 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 480 [2021-06-05 04:08:03,584 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 840 DAG size of output: 500 [2021-06-05 04:08:04,133 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 937 DAG size of output: 538 [2021-06-05 04:08:04,718 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 1090 DAG size of output: 589 [2021-06-05 04:08:06,381 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 2240 DAG size of output: 1268 [2021-06-05 04:08:08,142 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 914 DAG size of output: 944 [2021-06-05 04:08:08,927 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 487 [2021-06-05 04:08:10,001 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 252 [2021-06-05 04:08:10,172 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 261 [2021-06-05 04:08:10,462 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 290 [2021-06-05 04:08:11,364 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 251 [2021-06-05 04:08:11,548 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 266 [2021-06-05 04:08:11,817 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 300 [2021-06-05 04:08:12,282 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 419 [2021-06-05 04:08:12,762 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 756 DAG size of output: 464 [2021-06-05 04:08:12,867 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 635 [2021-06-05 04:08:13,395 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 316 [2021-06-05 04:08:14,334 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 277 [2021-06-05 04:08:15,387 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 452 [2021-06-05 04:08:15,783 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 464 [2021-06-05 04:08:16,275 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 492 [2021-06-05 04:08:16,788 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 529 [2021-06-05 04:08:17,624 WARN L205 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 1332 DAG size of output: 697 [2021-06-05 04:08:20,221 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 3118 DAG size of output: 1567 [2021-06-05 04:08:23,040 WARN L205 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 1218 DAG size of output: 1431 [2021-06-05 04:08:23,232 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 1087 DAG size of output: 1087 [2021-06-05 04:08:23,503 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 964 [2021-06-05 04:08:24,750 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 896 DAG size of output: 992 [2021-06-05 04:08:25,301 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 624 [2021-06-05 04:08:25,800 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 273 [2021-06-05 04:08:26,044 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 322 [2021-06-05 04:08:26,613 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 254 [2021-06-05 04:08:26,782 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 282 [2021-06-05 04:08:27,226 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 651 DAG size of output: 457 [2021-06-05 04:08:27,937 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 243 [2021-06-05 04:08:28,187 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 285 [2021-06-05 04:08:28,806 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 1004 DAG size of output: 531 [2021-06-05 04:08:29,753 WARN L205 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 1110 DAG size of output: 573 [2021-06-05 04:08:30,618 WARN L205 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 662 [2021-06-05 04:08:31,718 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 656 DAG size of output: 696 [2021-06-05 04:08:32,057 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 231 [2021-06-05 04:08:32,564 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 186 [2021-06-05 04:08:33,191 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 216 [2021-06-05 04:08:33,399 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 230 [2021-06-05 04:08:33,689 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 257 [2021-06-05 04:08:33,955 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 276 [2021-06-05 04:08:34,252 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 360 [2021-06-05 04:08:34,489 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 306 [2021-06-05 04:08:35,397 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 181 [2021-06-05 04:08:35,724 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 378 [2021-06-05 04:08:36,765 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 191 [2021-06-05 04:08:37,010 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 205 [2021-06-05 04:08:37,427 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 304 [2021-06-05 04:08:38,980 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 1932 DAG size of output: 829 [2021-06-05 04:08:43,338 WARN L205 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-06-05 04:08:47,729 WARN L205 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 4820 DAG size of output: 2203 [2021-06-05 04:08:53,964 WARN L205 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 4827 DAG size of output: 2446 [2021-06-05 04:08:54,588 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 701 [2021-06-05 04:08:55,374 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 366 [2021-06-05 04:08:57,549 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 1696 DAG size of output: 1306 [2021-06-05 04:08:58,000 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 847 [2021-06-05 04:08:58,896 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 437 [2021-06-05 04:08:59,133 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 328 [2021-06-05 04:08:59,875 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 527 [2021-06-05 04:09:00,762 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-06-05 04:09:01,656 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 1785 DAG size of output: 773 [2021-06-05 04:09:02,639 WARN L205 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 1790 DAG size of output: 775 [2021-06-05 04:09:03,276 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 780 [2021-06-05 04:09:04,400 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 281 [2021-06-05 04:09:04,568 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-06-05 04:09:04,735 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 324 [2021-06-05 04:09:04,957 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 249 [2021-06-05 04:09:05,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:05,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:05,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:05,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:09:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:05,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129049103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:05,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:05,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:09:05,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789726305] [2021-06-05 04:09:05,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:09:05,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:05,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:09:05,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:05,247 INFO L87 Difference]: Start difference. First operand 625 states and 1859 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:05,485 INFO L93 Difference]: Finished difference Result 848 states and 2360 transitions. [2021-06-05 04:09:05,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:09:05,485 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:09:05,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:05,486 INFO L225 Difference]: With dead ends: 848 [2021-06-05 04:09:05,486 INFO L226 Difference]: Without dead ends: 845 [2021-06-05 04:09:05,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-06-05 04:09:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-06-05 04:09:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0319444444444446) internal successors, (2183), 720 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2183 transitions. [2021-06-05 04:09:05,496 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2183 transitions. Word has length 21 [2021-06-05 04:09:05,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:05,496 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2183 transitions. [2021-06-05 04:09:05,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2183 transitions. [2021-06-05 04:09:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:09:05,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:05,497 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:05,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 04:09:05,698 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:05,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:05,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1684323737, now seen corresponding path program 70 times [2021-06-05 04:09:05,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:05,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623298950] [2021-06-05 04:09:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:05,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:05,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623298950] [2021-06-05 04:09:05,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623298950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:05,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778335518] [2021-06-05 04:09:05,770 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 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 04:09:05,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:05,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:09:05,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:06,180 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:09:06,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:06,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:09:07,228 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 448 [2021-06-05 04:09:07,444 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 454 [2021-06-05 04:09:08,427 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 610 [2021-06-05 04:09:08,887 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 825 DAG size of output: 622 [2021-06-05 04:09:09,432 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-06-05 04:09:09,975 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 645 [2021-06-05 04:09:10,580 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 858 DAG size of output: 656 [2021-06-05 04:09:11,255 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 658 DAG size of output: 764 [2021-06-05 04:09:11,708 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 646 [2021-06-05 04:09:12,172 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 643 DAG size of output: 656 [2021-06-05 04:09:12,359 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 404 [2021-06-05 04:09:13,287 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 255 [2021-06-05 04:09:13,760 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 344 [2021-06-05 04:09:13,998 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 379 [2021-06-05 04:09:14,269 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 396 [2021-06-05 04:09:14,666 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-06-05 04:09:15,049 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 806 DAG size of output: 485 [2021-06-05 04:09:15,604 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 491 [2021-06-05 04:09:16,104 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 525 [2021-06-05 04:09:16,419 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 405 [2021-06-05 04:09:16,533 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 238 [2021-06-05 04:09:17,024 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 356 [2021-06-05 04:09:17,371 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 310 [2021-06-05 04:09:17,946 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 236 [2021-06-05 04:09:18,140 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 302 [2021-06-05 04:09:18,393 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 401 [2021-06-05 04:09:18,562 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-06-05 04:09:18,905 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 214 [2021-06-05 04:09:19,329 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 275 [2021-06-05 04:09:19,848 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 267 [2021-06-05 04:09:20,202 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-06-05 04:09:20,551 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 471 [2021-06-05 04:09:20,938 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 474 [2021-06-05 04:09:21,279 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 527 [2021-06-05 04:09:21,774 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 160 [2021-06-05 04:09:22,598 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 283 [2021-06-05 04:09:22,799 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-06-05 04:09:23,004 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 314 [2021-06-05 04:09:23,221 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 320 [2021-06-05 04:09:23,427 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 367 [2021-06-05 04:09:23,877 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 308 [2021-06-05 04:09:24,524 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-06-05 04:09:24,664 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 274 [2021-06-05 04:09:24,832 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 276 [2021-06-05 04:09:25,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:25,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:25,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:25,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:09:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:25,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778335518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:25,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:25,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:09:25,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102672612] [2021-06-05 04:09:25,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:09:25,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:25,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:09:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:25,116 INFO L87 Difference]: Start difference. First operand 721 states and 2183 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:09:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:25,379 INFO L93 Difference]: Finished difference Result 961 states and 2736 transitions. [2021-06-05 04:09:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:09:25,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:09:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:25,381 INFO L225 Difference]: With dead ends: 961 [2021-06-05 04:09:25,381 INFO L226 Difference]: Without dead ends: 958 [2021-06-05 04:09:25,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-06-05 04:09:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-06-05 04:09:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.1014851485148514) internal successors, (2506), 808 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2506 transitions. [2021-06-05 04:09:25,390 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2506 transitions. Word has length 21 [2021-06-05 04:09:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:25,391 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2506 transitions. [2021-06-05 04:09:25,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:09:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2506 transitions. [2021-06-05 04:09:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:09:25,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:25,392 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:25,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5383 [2021-06-05 04:09:25,593 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:25,593 INFO L82 PathProgramCache]: Analyzing trace with hash 161319513, now seen corresponding path program 71 times [2021-06-05 04:09:25,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:25,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321619662] [2021-06-05 04:09:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:25,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:25,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321619662] [2021-06-05 04:09:25,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321619662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:25,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718284466] [2021-06-05 04:09:25,659 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 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 04:09:25,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:09:25,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:09:25,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:26,031 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:09:26,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:09:26,685 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 247 [2021-06-05 04:09:26,819 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 267 [2021-06-05 04:09:26,989 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 281 [2021-06-05 04:09:27,615 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 241 [2021-06-05 04:09:27,742 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 256 [2021-06-05 04:09:28,055 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-05 04:09:28,376 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-06-05 04:09:28,746 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 420 [2021-06-05 04:09:29,257 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 522 [2021-06-05 04:09:29,476 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 274 [2021-06-05 04:09:29,624 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 312 [2021-06-05 04:09:30,331 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 260 [2021-06-05 04:09:31,361 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 268 [2021-06-05 04:09:31,611 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 420 [2021-06-05 04:09:31,943 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 416 [2021-06-05 04:09:32,961 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 452 [2021-06-05 04:09:33,471 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 712 DAG size of output: 504 [2021-06-05 04:09:33,722 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 318 [2021-06-05 04:09:34,692 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 251 [2021-06-05 04:09:34,882 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 286 [2021-06-05 04:09:35,765 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 315 [2021-06-05 04:09:36,542 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-06-05 04:09:37,322 WARN L205 SmtUtils]: Spent 774.00 ms on a formula simplification. DAG size of input: 1072 DAG size of output: 665 [2021-06-05 04:09:38,377 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1080 DAG size of output: 713 [2021-06-05 04:09:38,892 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 636 [2021-06-05 04:09:39,335 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 563 [2021-06-05 04:09:39,484 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 282 [2021-06-05 04:09:39,606 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 271 [2021-06-05 04:09:40,047 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 257 [2021-06-05 04:09:40,247 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 334 [2021-06-05 04:09:40,758 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 325 [2021-06-05 04:09:40,916 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 274 [2021-06-05 04:09:41,066 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 271 [2021-06-05 04:09:41,890 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-06-05 04:09:42,122 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 357 [2021-06-05 04:09:42,394 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 365 [2021-06-05 04:09:42,705 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 284 [2021-06-05 04:09:42,840 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 218 [2021-06-05 04:09:43,391 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-06-05 04:09:43,515 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 245 [2021-06-05 04:09:43,639 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 250 [2021-06-05 04:09:44,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:44,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:44,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:44,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:09:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:44,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718284466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:44,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:44,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:09:44,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279253085] [2021-06-05 04:09:44,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:09:44,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:09:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:44,199 INFO L87 Difference]: Start difference. First operand 809 states and 2506 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:09:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:44,456 INFO L93 Difference]: Finished difference Result 1077 states and 3152 transitions. [2021-06-05 04:09:44,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:09:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:09:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:44,458 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 04:09:44,458 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 04:09:44,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 04:09:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-06-05 04:09:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1783369803063457) internal successors, (2905), 914 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2905 transitions. [2021-06-05 04:09:44,469 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2905 transitions. Word has length 21 [2021-06-05 04:09:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:44,469 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2905 transitions. [2021-06-05 04:09:44,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:09:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2905 transitions. [2021-06-05 04:09:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:09:44,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:44,470 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:44,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6461 [2021-06-05 04:09:44,685 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:44,685 INFO L82 PathProgramCache]: Analyzing trace with hash 192828825, now seen corresponding path program 72 times [2021-06-05 04:09:44,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:44,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164288872] [2021-06-05 04:09:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:44,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:44,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164288872] [2021-06-05 04:09:44,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164288872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:44,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111128020] [2021-06-05 04:09:44,754 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 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 04:09:44,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:09:44,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:44,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:09:44,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:45,134 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:09:45,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:45,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:09:46,036 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 410 [2021-06-05 04:09:46,726 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 571 [2021-06-05 04:09:47,484 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 319 [2021-06-05 04:09:47,661 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 388 [2021-06-05 04:09:48,214 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 847 [2021-06-05 04:09:48,889 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 862 [2021-06-05 04:09:49,659 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-06-05 04:09:50,424 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 870 [2021-06-05 04:09:51,324 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 1136 DAG size of output: 887 [2021-06-05 04:09:51,996 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 883 DAG size of output: 931 [2021-06-05 04:09:52,370 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 876 DAG size of output: 419 [2021-06-05 04:09:52,892 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 498 [2021-06-05 04:09:53,984 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 264 [2021-06-05 04:09:54,249 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 439 [2021-06-05 04:09:54,620 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 525 [2021-06-05 04:09:55,113 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-06-05 04:09:55,605 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 597 [2021-06-05 04:09:56,246 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 633 [2021-06-05 04:09:56,673 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 599 DAG size of output: 599 [2021-06-05 04:09:56,954 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 529 [2021-06-05 04:09:57,916 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 300 [2021-06-05 04:09:58,075 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 589 DAG size of output: 325 [2021-06-05 04:09:58,285 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-06-05 04:09:58,505 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 375 [2021-06-05 04:09:58,736 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 381 [2021-06-05 04:09:58,899 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 298 [2021-06-05 04:09:59,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:59,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:59,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:59,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:09:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:59,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111128020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:59,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:59,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:09:59,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338598208] [2021-06-05 04:09:59,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:09:59,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:59,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:09:59,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:59,906 INFO L87 Difference]: Start difference. First operand 915 states and 2905 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:10:00,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:00,155 INFO L93 Difference]: Finished difference Result 1209 states and 3643 transitions. [2021-06-05 04:10:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:10:00,156 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:10:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:00,158 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 04:10:00,158 INFO L226 Difference]: Without dead ends: 1206 [2021-06-05 04:10:00,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-06-05 04:10:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1042. [2021-06-05 04:10:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2526416906820366) internal successors, (3386), 1041 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3386 transitions. [2021-06-05 04:10:00,172 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3386 transitions. Word has length 21 [2021-06-05 04:10:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:00,172 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 3386 transitions. [2021-06-05 04:10:00,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:10:00,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3386 transitions. [2021-06-05 04:10:00,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:10:00,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:00,173 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:00,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7256 [2021-06-05 04:10:00,389 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1169617497, now seen corresponding path program 73 times [2021-06-05 04:10:00,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:00,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346190963] [2021-06-05 04:10:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:00,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:00,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346190963] [2021-06-05 04:10:00,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346190963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:00,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485232079] [2021-06-05 04:10:00,452 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 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 04:10:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:00,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:10:00,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:00,890 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:10:00,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:00,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:10:01,825 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 279 [2021-06-05 04:10:02,026 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 354 [2021-06-05 04:10:02,249 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 375 [2021-06-05 04:10:02,535 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 395 [2021-06-05 04:10:02,854 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-06-05 04:10:03,178 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 406 [2021-06-05 04:10:03,552 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 421 [2021-06-05 04:10:03,978 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 448 [2021-06-05 04:10:04,150 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 282 [2021-06-05 04:10:04,856 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 264 [2021-06-05 04:10:05,041 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 282 [2021-06-05 04:10:05,169 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 261 [2021-06-05 04:10:06,185 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 180 [2021-06-05 04:10:07,382 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 234 [2021-06-05 04:10:07,637 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 325 [2021-06-05 04:10:08,036 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-06-05 04:10:08,419 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 881 DAG size of output: 445 [2021-06-05 04:10:09,243 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 602 [2021-06-05 04:10:09,483 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 384 [2021-06-05 04:10:09,758 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 277 [2021-06-05 04:10:10,053 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 281 [2021-06-05 04:10:10,441 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 472 [2021-06-05 04:10:10,719 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 274 [2021-06-05 04:10:11,159 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 291 [2021-06-05 04:10:11,612 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-06-05 04:10:12,073 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 404 [2021-06-05 04:10:12,576 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 412 [2021-06-05 04:10:13,069 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 405 [2021-06-05 04:10:13,527 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 366 [2021-06-05 04:10:13,943 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 463 [2021-06-05 04:10:14,705 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 394 [2021-06-05 04:10:15,291 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 263 [2021-06-05 04:10:15,452 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 326 [2021-06-05 04:10:15,797 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 369 [2021-06-05 04:10:16,055 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-06-05 04:10:16,317 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 379 [2021-06-05 04:10:16,604 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 383 [2021-06-05 04:10:16,880 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 409 [2021-06-05 04:10:17,065 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 258 [2021-06-05 04:10:17,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:17,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:17,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:17,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:10:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:17,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485232079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:17,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:17,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:10:17,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878707389] [2021-06-05 04:10:17,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:10:17,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:17,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:10:17,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:17,422 INFO L87 Difference]: Start difference. First operand 1042 states and 3386 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:10:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:17,690 INFO L93 Difference]: Finished difference Result 1356 states and 4198 transitions. [2021-06-05 04:10:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:10:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:10:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:17,692 INFO L225 Difference]: With dead ends: 1356 [2021-06-05 04:10:17,693 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 04:10:17,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 04:10:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-06-05 04:10:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3187552565180822) internal successors, (3946), 1189 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3946 transitions. [2021-06-05 04:10:17,707 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3946 transitions. Word has length 21 [2021-06-05 04:10:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:17,707 INFO L482 AbstractCegarLoop]: Abstraction has 1190 states and 3946 transitions. [2021-06-05 04:10:17,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:10:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3946 transitions. [2021-06-05 04:10:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:10:17,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:17,709 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:17,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8393 [2021-06-05 04:10:17,925 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:17,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1385295257, now seen corresponding path program 74 times [2021-06-05 04:10:17,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:17,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665121481] [2021-06-05 04:10:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:10:18,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:18,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665121481] [2021-06-05 04:10:18,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665121481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:18,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001082161] [2021-06-05 04:10:18,019 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 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 04:10:18,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:18,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:10:18,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:18,475 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:10:18,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:18,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:10:19,089 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 291 [2021-06-05 04:10:19,218 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 312 [2021-06-05 04:10:19,384 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 318 [2021-06-05 04:10:20,018 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 285 [2021-06-05 04:10:20,156 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 292 [2021-06-05 04:10:20,484 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-06-05 04:10:20,804 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 489 [2021-06-05 04:10:21,183 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 505 [2021-06-05 04:10:21,844 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 507 DAG size of output: 616 [2021-06-05 04:10:22,156 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 288 [2021-06-05 04:10:22,597 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 328 [2021-06-05 04:10:22,826 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 349 [2021-06-05 04:10:22,985 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 276 [2021-06-05 04:10:23,882 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 302 [2021-06-05 04:10:24,012 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 240 [2021-06-05 04:10:24,784 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 293 [2021-06-05 04:10:24,988 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 360 [2021-06-05 04:10:25,352 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 478 [2021-06-05 04:10:25,507 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 293 [2021-06-05 04:10:25,613 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 225 [2021-06-05 04:10:26,238 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 280 [2021-06-05 04:10:26,420 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 334 [2021-06-05 04:10:26,566 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 243 [2021-06-05 04:10:27,283 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 280 [2021-06-05 04:10:27,607 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 714 DAG size of output: 442 [2021-06-05 04:10:28,295 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 1161 DAG size of output: 684 [2021-06-05 04:10:29,183 WARN L205 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 761 [2021-06-05 04:10:29,454 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 306 [2021-06-05 04:10:29,989 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 392 [2021-06-05 04:10:30,321 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 388 [2021-06-05 04:10:30,561 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 322 [2021-06-05 04:10:30,710 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 287 [2021-06-05 04:10:31,468 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 397 DAG size of output: 302 [2021-06-05 04:10:31,627 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 316 [2021-06-05 04:10:31,817 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 327 [2021-06-05 04:10:32,039 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 364 [2021-06-05 04:10:32,352 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 433 [2021-06-05 04:10:32,546 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-06-05 04:10:32,677 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 246 [2021-06-05 04:10:33,350 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 259 [2021-06-05 04:10:33,470 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 314 [2021-06-05 04:10:33,621 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 388 [2021-06-05 04:10:33,872 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 413 [2021-06-05 04:10:34,166 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 488 [2021-06-05 04:10:34,509 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 480 [2021-06-05 04:10:34,950 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 550 [2021-06-05 04:10:35,727 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 736 [2021-06-05 04:10:35,970 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 340 [2021-06-05 04:10:36,855 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 259 [2021-06-05 04:10:36,985 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 307 [2021-06-05 04:10:37,151 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 370 [2021-06-05 04:10:37,377 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 432 [2021-06-05 04:10:37,707 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 588 DAG size of output: 428 [2021-06-05 04:10:37,828 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 261 [2021-06-05 04:10:38,727 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 354 [2021-06-05 04:10:38,886 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 339 [2021-06-05 04:10:39,119 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 423 [2021-06-05 04:10:39,434 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 641 DAG size of output: 483 [2021-06-05 04:10:40,054 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 691 [2021-06-05 04:10:41,476 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 1870 DAG size of output: 1108 [2021-06-05 04:10:43,171 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 2044 DAG size of output: 1183 [2021-06-05 04:10:46,144 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 2890 DAG size of output: 1692 [2021-06-05 04:10:46,289 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 289 [2021-06-05 04:10:46,625 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 354 [2021-06-05 04:10:46,833 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 354 [2021-06-05 04:10:47,084 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 309 [2021-06-05 04:10:47,194 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 243 [2021-06-05 04:10:48,084 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-05 04:10:48,243 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 290 [2021-06-05 04:10:48,432 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 293 [2021-06-05 04:10:48,589 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 267 [2021-06-05 04:10:49,605 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 268 [2021-06-05 04:10:49,809 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-06-05 04:10:50,013 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 298 [2021-06-05 04:10:50,243 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 301 [2021-06-05 04:10:50,706 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 652 DAG size of output: 485 [2021-06-05 04:10:50,849 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 303 [2021-06-05 04:10:51,731 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 258 [2021-06-05 04:10:51,920 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-06-05 04:10:52,106 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 291 [2021-06-05 04:10:52,311 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 294 [2021-06-05 04:10:52,437 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 270 [2021-06-05 04:10:53,254 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-06-05 04:10:53,380 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 261 [2021-06-05 04:10:53,529 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 264 [2021-06-05 04:10:53,928 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 443 [2021-06-05 04:10:54,860 WARN L205 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 722 [2021-06-05 04:10:55,981 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1072 DAG size of output: 775 [2021-06-05 04:11:00,143 WARN L205 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-06-05 04:11:04,299 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 3707 DAG size of output: 2079 [2021-06-05 04:11:08,933 WARN L205 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 3718 DAG size of output: 2090 [2021-06-05 04:11:09,125 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 2086 [2021-06-05 04:11:13,605 WARN L205 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 2088 DAG size of output: 2316 [2021-06-05 04:11:13,750 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 1575 [2021-06-05 04:11:13,894 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 265 [2021-06-05 04:11:15,930 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1537 DAG size of output: 1228 [2021-06-05 04:11:17,886 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 1226 DAG size of output: 1271 [2021-06-05 04:11:18,497 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 575 [2021-06-05 04:11:18,849 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 251 [2021-06-05 04:11:19,291 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 270 [2021-06-05 04:11:19,499 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 313 [2021-06-05 04:11:20,006 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 581 [2021-06-05 04:11:21,213 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 806 DAG size of output: 1066 [2021-06-05 04:11:21,496 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 317 [2021-06-05 04:11:22,953 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 578 [2021-06-05 04:11:23,653 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 694 [2021-06-05 04:11:24,960 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 1351 DAG size of output: 1077 [2021-06-05 04:11:27,848 WARN L205 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-06-05 04:11:30,745 WARN L205 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 2520 DAG size of output: 1683 [2021-06-05 04:11:33,782 WARN L205 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 2529 DAG size of output: 1364 [2021-06-05 04:11:34,714 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 273 [2021-06-05 04:11:35,709 WARN L205 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-06-05 04:11:36,510 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 1112 DAG size of output: 857 [2021-06-05 04:11:37,384 WARN L205 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 1115 DAG size of output: 860 [2021-06-05 04:11:37,863 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 608 [2021-06-05 04:11:38,028 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 478 [2021-06-05 04:11:38,555 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 274 [2021-06-05 04:11:39,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:39,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:39,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:39,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:11:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:39,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001082161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:39,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:39,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:11:39,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702992884] [2021-06-05 04:11:39,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:11:39,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:39,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:11:39,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:11:39,029 INFO L87 Difference]: Start difference. First operand 1190 states and 3946 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:11:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:39,336 INFO L93 Difference]: Finished difference Result 1521 states and 4814 transitions. [2021-06-05 04:11:39,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:11:39,336 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:11:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:39,339 INFO L225 Difference]: With dead ends: 1521 [2021-06-05 04:11:39,339 INFO L226 Difference]: Without dead ends: 1518 [2021-06-05 04:11:39,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:11:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-05 04:11:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-06-05 04:11:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.37379718726869) internal successors, (4558), 1351 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:11:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4558 transitions. [2021-06-05 04:11:39,356 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4558 transitions. Word has length 21 [2021-06-05 04:11:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:39,356 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4558 transitions. [2021-06-05 04:11:39,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:11:39,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4558 transitions. [2021-06-05 04:11:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:11:39,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:39,358 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:39,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9235 [2021-06-05 04:11:39,574 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -518628775, now seen corresponding path program 75 times [2021-06-05 04:11:39,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:39,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340921522] [2021-06-05 04:11:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:11:39,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:39,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340921522] [2021-06-05 04:11:39,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340921522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:39,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342491120] [2021-06-05 04:11:39,643 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 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 04:11:39,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:11:39,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:11:39,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:11:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:40,050 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:11:40,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:40,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:11:40,798 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 272 [2021-06-05 04:11:40,936 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 292 [2021-06-05 04:11:41,622 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 289 [2021-06-05 04:11:41,754 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 307 [2021-06-05 04:11:41,917 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 326 [2021-06-05 04:11:42,288 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 482 [2021-06-05 04:11:42,725 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-06-05 04:11:43,160 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 612 DAG size of output: 500 [2021-06-05 04:11:43,669 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 516 [2021-06-05 04:11:44,679 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 518 DAG size of output: 643 [2021-06-05 04:11:45,204 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 475 [2021-06-05 04:11:45,722 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 474 [2021-06-05 04:11:45,924 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 316 [2021-06-05 04:11:46,160 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-06-05 04:11:46,363 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 325 [2021-06-05 04:11:47,270 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 217 [2021-06-05 04:11:47,424 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 239 [2021-06-05 04:11:48,168 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 216 [2021-06-05 04:11:48,448 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 301 [2021-06-05 04:11:49,272 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 249 [2021-06-05 04:11:50,038 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 371 [2021-06-05 04:11:50,634 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 685 DAG size of output: 520 [2021-06-05 04:11:51,400 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 767 DAG size of output: 574 [2021-06-05 04:11:52,371 WARN L205 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 633 [2021-06-05 04:11:53,351 WARN L205 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 890 DAG size of output: 657 [2021-06-05 04:11:53,577 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 333 [2021-06-05 04:11:53,771 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 336 [2021-06-05 04:11:53,937 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 287 [2021-06-05 04:11:55,310 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 232 [2021-06-05 04:11:55,534 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 366 [2021-06-05 04:11:55,849 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 411 [2021-06-05 04:11:56,039 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 301 [2021-06-05 04:11:57,320 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 263 [2021-06-05 04:11:57,561 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 361 [2021-06-05 04:11:58,204 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 569 [2021-06-05 04:11:58,864 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 583 [2021-06-05 04:11:59,685 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 644 [2021-06-05 04:12:00,692 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 895 DAG size of output: 705 [2021-06-05 04:12:02,846 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 1440 DAG size of output: 1133 [2021-06-05 04:12:03,320 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 450 [2021-06-05 04:12:03,514 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 316 [2021-06-05 04:12:05,007 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 260 [2021-06-05 04:12:05,263 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 341 [2021-06-05 04:12:05,570 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 367 [2021-06-05 04:12:05,950 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 395 [2021-06-05 04:12:06,413 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 417 [2021-06-05 04:12:07,336 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 296 [2021-06-05 04:12:07,949 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 410 [2021-06-05 04:12:08,262 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 438 [2021-06-05 04:12:08,619 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 471 [2021-06-05 04:12:09,498 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 665 [2021-06-05 04:12:10,409 WARN L205 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 992 DAG size of output: 678 [2021-06-05 04:12:10,672 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 347 [2021-06-05 04:12:10,887 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 331 [2021-06-05 04:12:11,047 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 324 [2021-06-05 04:12:11,750 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 230 [2021-06-05 04:12:11,885 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 251 [2021-06-05 04:12:12,049 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 271 [2021-06-05 04:12:12,718 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 241 [2021-06-05 04:12:12,865 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 271 [2021-06-05 04:12:13,216 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 418 [2021-06-05 04:12:13,419 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 310 [2021-06-05 04:12:14,420 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 275 [2021-06-05 04:12:15,085 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 365 [2021-06-05 04:12:15,726 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 549 [2021-06-05 04:12:16,565 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 815 DAG size of output: 620 [2021-06-05 04:12:17,417 WARN L205 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 634 [2021-06-05 04:12:18,459 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 938 DAG size of output: 703 [2021-06-05 04:12:20,519 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 1564 DAG size of output: 1152 [2021-06-05 04:12:23,056 WARN L205 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 1734 DAG size of output: 1295 [2021-06-05 04:12:28,334 WARN L205 SmtUtils]: Spent 5.27 s on a formula simplification. DAG size of input: 2788 DAG size of output: 2064 [2021-06-05 04:12:33,842 WARN L205 SmtUtils]: Spent 5.50 s on a formula simplification. DAG size of input: 2928 DAG size of output: 2124 [2021-06-05 04:12:40,796 WARN L205 SmtUtils]: Spent 6.94 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-06-05 04:12:47,713 WARN L205 SmtUtils]: Spent 6.91 s on a formula simplification. DAG size of input: 3163 DAG size of output: 2214 [2021-06-05 04:12:55,383 WARN L205 SmtUtils]: Spent 7.66 s on a formula simplification. DAG size of input: 3174 DAG size of output: 2225 [2021-06-05 04:12:56,123 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 2225 DAG size of output: 2208 [2021-06-05 04:13:07,847 WARN L205 SmtUtils]: Spent 11.71 s on a formula simplification. DAG size of input: 2137 DAG size of output: 2835 [2021-06-05 04:13:10,435 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 1075 DAG size of output: 1188 [2021-06-05 04:13:12,262 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 838 DAG size of output: 931 [2021-06-05 04:13:12,552 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 318 [2021-06-05 04:13:12,730 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 383 [2021-06-05 04:13:12,848 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 214 [2021-06-05 04:13:13,337 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 273 [2021-06-05 04:13:13,748 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 328 [2021-06-05 04:13:14,427 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 535 [2021-06-05 04:13:15,882 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 601 DAG size of output: 858 [2021-06-05 04:13:16,345 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 590 DAG size of output: 436 [2021-06-05 04:13:16,662 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 321 [2021-06-05 04:13:17,267 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 248 [2021-06-05 04:13:17,418 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 256 [2021-06-05 04:13:17,964 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 510 [2021-06-05 04:13:18,987 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1520 DAG size of output: 716 [2021-06-05 04:13:21,063 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 1982 DAG size of output: 1850 [2021-06-05 04:13:24,443 WARN L205 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 1065 DAG size of output: 1160 [2021-06-05 04:13:25,732 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 616 DAG size of output: 881 [2021-06-05 04:13:26,998 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 605 DAG size of output: 873 [2021-06-05 04:13:27,146 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 592 DAG size of output: 559 [2021-06-05 04:13:27,517 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 360 [2021-06-05 04:13:27,642 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 245 [2021-06-05 04:13:28,202 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 252 [2021-06-05 04:13:28,394 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 316 [2021-06-05 04:13:28,829 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 487 [2021-06-05 04:13:29,753 WARN L205 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 1169 DAG size of output: 828 [2021-06-05 04:13:30,637 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 592 [2021-06-05 04:13:31,123 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 343 [2021-06-05 04:13:31,281 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 364 [2021-06-05 04:13:31,553 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 367 [2021-06-05 04:13:32,094 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 269 [2021-06-05 04:13:32,337 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 405 [2021-06-05 04:13:32,678 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 463 [2021-06-05 04:13:33,411 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 1049 DAG size of output: 630 [2021-06-05 04:13:35,302 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 1986 DAG size of output: 1308 [2021-06-05 04:13:38,162 WARN L205 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 2724 DAG size of output: 1643 [2021-06-05 04:13:41,694 WARN L205 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 3974 DAG size of output: 1745 [2021-06-05 04:13:45,747 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-06-05 04:13:49,830 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 4043 DAG size of output: 1781 [2021-06-05 04:13:54,164 WARN L205 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 4048 DAG size of output: 1786 [2021-06-05 04:13:56,357 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 1788 DAG size of output: 1154 [2021-06-05 04:13:56,520 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 861 DAG size of output: 861 [2021-06-05 04:13:57,708 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 858 DAG size of output: 808 [2021-06-05 04:13:57,862 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 194 [2021-06-05 04:13:58,288 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 275 [2021-06-05 04:13:58,812 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 516 DAG size of output: 344 [2021-06-05 04:13:59,150 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 666 DAG size of output: 437 [2021-06-05 04:13:59,554 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 440 [2021-06-05 04:13:59,953 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 372 [2021-06-05 04:14:00,123 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 254 [2021-06-05 04:14:00,509 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 235 [2021-06-05 04:14:01,112 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-06-05 04:14:01,714 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 592 [2021-06-05 04:14:02,364 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 594 [2021-06-05 04:14:02,946 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-06-05 04:14:03,055 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 231 [2021-06-05 04:14:03,169 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 235 [2021-06-05 04:14:03,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:03,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:03,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:14:03,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:14:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:03,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342491120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:03,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:03,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:14:03,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785744036] [2021-06-05 04:14:03,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:14:03,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:03,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:14:03,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:03,349 INFO L87 Difference]: Start difference. First operand 1352 states and 4558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:14:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:03,563 INFO L93 Difference]: Finished difference Result 1650 states and 5275 transitions. [2021-06-05 04:14:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:14:03,564 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:14:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:03,566 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 04:14:03,566 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 04:14:03,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 04:14:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-06-05 04:14:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.391509433962264) internal successors, (5033), 1484 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5033 transitions. [2021-06-05 04:14:03,586 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5033 transitions. Word has length 21 [2021-06-05 04:14:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:03,586 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 5033 transitions. [2021-06-05 04:14:03,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:14:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5033 transitions. [2021-06-05 04:14:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:14:03,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:03,588 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:03,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11252,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:03,805 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash 589268377, now seen corresponding path program 76 times [2021-06-05 04:14:03,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:03,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77078328] [2021-06-05 04:14:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:03,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:03,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77078328] [2021-06-05 04:14:03,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77078328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:03,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455098538] [2021-06-05 04:14:03,879 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 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 04:14:03,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:03,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:14:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:04,296 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:14:04,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:04,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:14:04,999 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 278 [2021-06-05 04:14:05,136 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 283 [2021-06-05 04:14:05,300 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-06-05 04:14:05,477 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 303 [2021-06-05 04:14:05,677 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 318 [2021-06-05 04:14:06,040 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 388 [2021-06-05 04:14:06,465 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 416 [2021-06-05 04:14:06,658 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 323 [2021-06-05 04:14:06,859 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 340 [2021-06-05 04:14:07,006 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 286 [2021-06-05 04:14:07,515 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 318 [2021-06-05 04:14:07,757 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 273 [2021-06-05 04:14:08,390 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 243 [2021-06-05 04:14:08,961 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 350 [2021-06-05 04:14:09,183 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 364 [2021-06-05 04:14:09,510 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 640 DAG size of output: 457 [2021-06-05 04:14:09,929 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 501 [2021-06-05 04:14:10,491 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 609 [2021-06-05 04:14:10,943 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 295 [2021-06-05 04:14:12,176 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 263 [2021-06-05 04:14:12,447 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 324 [2021-06-05 04:14:12,770 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 362 [2021-06-05 04:14:13,643 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 1218 DAG size of output: 764 [2021-06-05 04:14:14,795 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1311 DAG size of output: 833 [2021-06-05 04:14:16,233 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 1466 DAG size of output: 958 [2021-06-05 04:14:16,682 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 383 [2021-06-05 04:14:16,898 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 332 [2021-06-05 04:14:17,283 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 297 [2021-06-05 04:14:18,177 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 279 [2021-06-05 04:14:18,524 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 347 [2021-06-05 04:14:18,931 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 376 [2021-06-05 04:14:19,190 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 249 [2021-06-05 04:14:19,348 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 195 [2021-06-05 04:14:19,913 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 256 [2021-06-05 04:14:20,533 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 234 [2021-06-05 04:14:20,801 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 380 [2021-06-05 04:14:21,232 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 461 [2021-06-05 04:14:21,777 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 492 [2021-06-05 04:14:22,805 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1016 DAG size of output: 713 [2021-06-05 04:14:24,109 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 1150 DAG size of output: 764 [2021-06-05 04:14:27,093 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-06-05 04:14:30,090 WARN L205 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 2259 DAG size of output: 1437 [2021-06-05 04:14:33,276 WARN L205 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 2266 DAG size of output: 1444 [2021-06-05 04:14:33,405 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 1444 [2021-06-05 04:14:33,597 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 249 [2021-06-05 04:14:35,305 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 704 [2021-06-05 04:14:35,575 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 322 [2021-06-05 04:14:36,171 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-06-05 04:14:36,288 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 208 [2021-06-05 04:14:36,646 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 508 [2021-06-05 04:14:36,928 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 568 [2021-06-05 04:14:38,004 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 581 [2021-06-05 04:14:38,770 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 277 [2021-06-05 04:14:39,316 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 250 [2021-06-05 04:14:39,467 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 276 [2021-06-05 04:14:39,663 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 296 [2021-06-05 04:14:39,912 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-06-05 04:14:40,144 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 287 [2021-06-05 04:14:40,457 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 377 [2021-06-05 04:14:40,909 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 518 [2021-06-05 04:14:41,632 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 773 DAG size of output: 772 [2021-06-05 04:14:41,754 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 769 DAG size of output: 756 [2021-06-05 04:14:42,413 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 525 [2021-06-05 04:14:42,840 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 349 [2021-06-05 04:14:43,926 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 229 [2021-06-05 04:14:44,086 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 270 [2021-06-05 04:14:44,310 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 310 [2021-06-05 04:14:44,477 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 311 [2021-06-05 04:14:45,142 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-06-05 04:14:45,807 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 669 [2021-06-05 04:14:46,538 WARN L205 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 1459 DAG size of output: 674 [2021-06-05 04:14:47,256 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 701 [2021-06-05 04:14:47,433 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 240 [2021-06-05 04:14:48,052 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 450 [2021-06-05 04:14:48,773 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 336 [2021-06-05 04:14:48,999 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-06-05 04:14:49,237 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 384 [2021-06-05 04:14:49,490 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 383 [2021-06-05 04:14:49,790 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 474 [2021-06-05 04:14:50,042 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 426 [2021-06-05 04:14:50,447 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 284 [2021-06-05 04:14:50,744 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-06-05 04:14:50,852 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 244 [2021-06-05 04:14:50,965 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 463 DAG size of output: 236 [2021-06-05 04:14:51,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:14:51,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:51,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:14:51,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:14:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:51,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455098538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:51,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:51,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:14:51,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071354109] [2021-06-05 04:14:51,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:14:51,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:51,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:14:51,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:51,226 INFO L87 Difference]: Start difference. First operand 1485 states and 5033 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:14:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:51,454 INFO L93 Difference]: Finished difference Result 1787 states and 5757 transitions. [2021-06-05 04:14:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:14:51,455 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:14:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:51,457 INFO L225 Difference]: With dead ends: 1787 [2021-06-05 04:14:51,457 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 04:14:51,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 04:14:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-06-05 04:14:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.404938271604938) internal successors, (5516), 1620 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5516 transitions. [2021-06-05 04:14:51,477 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5516 transitions. Word has length 21 [2021-06-05 04:14:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:51,478 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5516 transitions. [2021-06-05 04:14:51,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:14:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5516 transitions. [2021-06-05 04:14:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:14:51,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:51,480 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:51,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15100 [2021-06-05 04:14:51,695 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash 574341721, now seen corresponding path program 77 times [2021-06-05 04:14:51,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:51,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056406706] [2021-06-05 04:14:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:51,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:51,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056406706] [2021-06-05 04:14:51,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056406706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:51,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484239083] [2021-06-05 04:14:51,763 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 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 04:14:51,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:14:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:51,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:14:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:52,147 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:14:52,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:14:52,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:14:52,795 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 300 [2021-06-05 04:14:52,958 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 316 [2021-06-05 04:14:53,138 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-06-05 04:14:53,317 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 339 [2021-06-05 04:14:53,544 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 355 [2021-06-05 04:14:53,861 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 449 [2021-06-05 04:14:54,421 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 482 [2021-06-05 04:14:54,595 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 310 [2021-06-05 04:14:54,712 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 289 [2021-06-05 04:14:54,884 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 239 [2021-06-05 04:14:55,702 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 239 [2021-06-05 04:14:55,900 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 257 [2021-06-05 04:14:56,666 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 210 [2021-06-05 04:14:56,795 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 242 [2021-06-05 04:14:57,034 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 318 [2021-06-05 04:14:57,870 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 210 [2021-06-05 04:14:58,010 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 245 [2021-06-05 04:14:58,924 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 208 [2021-06-05 04:14:59,079 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 245 [2021-06-05 04:14:59,388 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 335 [2021-06-05 04:15:00,018 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 534 [2021-06-05 04:15:00,895 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 1151 DAG size of output: 739 [2021-06-05 04:15:01,980 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-06-05 04:15:03,094 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1322 DAG size of output: 850 [2021-06-05 04:15:04,324 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 1333 DAG size of output: 861 [2021-06-05 04:15:07,156 WARN L205 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 863 DAG size of output: 853 [2021-06-05 04:15:08,884 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 840 DAG size of output: 1003 [2021-06-05 04:15:09,148 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 434 [2021-06-05 04:15:09,268 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 194 [2021-06-05 04:15:09,997 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 212 [2021-06-05 04:15:11,291 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 299 [2021-06-05 04:15:11,844 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 526 DAG size of output: 370 [2021-06-05 04:15:12,233 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 457 [2021-06-05 04:15:13,142 WARN L205 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 1159 DAG size of output: 615 [2021-06-05 04:15:14,673 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-06-05 04:15:15,767 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1357 DAG size of output: 702 [2021-06-05 04:15:16,923 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 1362 DAG size of output: 707 [2021-06-05 04:15:17,597 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 792 [2021-06-05 04:15:18,071 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 483 [2021-06-05 04:15:18,423 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 383 [2021-06-05 04:15:18,981 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 04:15:19,128 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 487 DAG size of output: 330 [2021-06-05 04:15:19,281 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 334 [2021-06-05 04:15:20,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:20,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:20,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:20,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:15:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:20,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484239083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:20,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:20,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:15:20,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444569695] [2021-06-05 04:15:20,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:15:20,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:20,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:15:20,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:20,313 INFO L87 Difference]: Start difference. First operand 1621 states and 5516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:15:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:20,635 INFO L93 Difference]: Finished difference Result 1931 states and 6243 transitions. [2021-06-05 04:15:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:15:20,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:15:20,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:20,638 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 04:15:20,638 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 04:15:20,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 04:15:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-06-05 04:15:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4077228847245884) internal successors, (6001), 1761 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6001 transitions. [2021-06-05 04:15:20,660 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6001 transitions. Word has length 21 [2021-06-05 04:15:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:20,660 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 6001 transitions. [2021-06-05 04:15:20,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:15:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6001 transitions. [2021-06-05 04:15:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:15:20,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:20,663 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:20,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16805,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:20,877 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash 111615385, now seen corresponding path program 78 times [2021-06-05 04:15:20,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:20,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943750272] [2021-06-05 04:15:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:20,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:20,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943750272] [2021-06-05 04:15:20,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943750272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:20,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313971247] [2021-06-05 04:15:20,937 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 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 04:15:20,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:15:20,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:15:20,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:21,354 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:15:21,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:21,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:15:21,888 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 308 [2021-06-05 04:15:22,031 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 319 [2021-06-05 04:15:22,703 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 419 [2021-06-05 04:15:23,476 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 301 [2021-06-05 04:15:23,917 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-06-05 04:15:24,357 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 613 [2021-06-05 04:15:24,861 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 631 [2021-06-05 04:15:25,445 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 700 [2021-06-05 04:15:25,592 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 621 [2021-06-05 04:15:25,714 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 257 [2021-06-05 04:15:26,502 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 202 [2021-06-05 04:15:26,672 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 333 [2021-06-05 04:15:28,144 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 262 [2021-06-05 04:15:28,258 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 273 [2021-06-05 04:15:28,461 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 332 [2021-06-05 04:15:28,720 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 365 [2021-06-05 04:15:29,145 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 459 [2021-06-05 04:15:29,678 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-06-05 04:15:30,191 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 522 [2021-06-05 04:15:30,912 WARN L205 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 554 [2021-06-05 04:15:31,418 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 548 [2021-06-05 04:15:31,587 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 514 [2021-06-05 04:15:31,716 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 449 [2021-06-05 04:15:32,510 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 263 [2021-06-05 04:15:32,873 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 214 [2021-06-05 04:15:33,019 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-06-05 04:15:33,185 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 249 [2021-06-05 04:15:33,354 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 260 [2021-06-05 04:15:33,506 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 265 [2021-06-05 04:15:33,710 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 209 [2021-06-05 04:15:34,454 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 222 [2021-06-05 04:15:35,439 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-06-05 04:15:35,606 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 328 [2021-06-05 04:15:35,793 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 332 [2021-06-05 04:15:35,999 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 353 [2021-06-05 04:15:36,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:15:36,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:36,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:15:36,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:15:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:36,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313971247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:36,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:36,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:15:36,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714066980] [2021-06-05 04:15:36,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:15:36,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:15:36,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:36,642 INFO L87 Difference]: Start difference. First operand 1762 states and 6001 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:15:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:36,911 INFO L93 Difference]: Finished difference Result 2066 states and 6683 transitions. [2021-06-05 04:15:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:15:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:15:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:36,914 INFO L225 Difference]: With dead ends: 2066 [2021-06-05 04:15:36,914 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 04:15:36,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 04:15:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-06-05 04:15:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4045478582760444) internal successors, (6438), 1891 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6438 transitions. [2021-06-05 04:15:36,958 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6438 transitions. Word has length 21 [2021-06-05 04:15:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:36,958 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6438 transitions. [2021-06-05 04:15:36,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:15:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6438 transitions. [2021-06-05 04:15:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:15:36,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:36,974 INFO L521 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:37,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18613,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:37,190 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1347999143, now seen corresponding path program 79 times [2021-06-05 04:15:37,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:37,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830435238] [2021-06-05 04:15:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:37,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:37,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830435238] [2021-06-05 04:15:37,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830435238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:37,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788670276] [2021-06-05 04:15:37,264 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 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 04:15:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:37,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:15:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:37,698 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:15:37,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:15:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:15:38,660 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-06-05 04:15:38,833 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 285 [2021-06-05 04:15:39,026 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 300 [2021-06-05 04:15:39,153 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 247 [2021-06-05 04:15:40,114 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 212 [2021-06-05 04:15:40,321 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 274 [2021-06-05 04:15:40,482 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 257 [2021-06-05 04:15:41,630 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 240 [2021-06-05 04:15:41,839 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 306 [2021-06-05 04:15:42,120 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 360 [2021-06-05 04:15:42,476 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 389 [2021-06-05 04:15:42,636 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 259 [2021-06-05 04:15:43,780 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 222 [2021-06-05 04:15:44,002 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 291 [2021-06-05 04:15:44,256 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 320 [2021-06-05 04:15:44,900 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 845 DAG size of output: 499 [2021-06-05 04:15:45,714 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 607 [2021-06-05 04:15:46,699 WARN L205 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 1105 DAG size of output: 633 [2021-06-05 04:15:46,972 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 239 [2021-06-05 04:15:47,076 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 223 [2021-06-05 04:15:48,219 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 195 [2021-06-05 04:15:48,402 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 252 [2021-06-05 04:15:48,689 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 273 [2021-06-05 04:15:49,016 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 333 [2021-06-05 04:15:49,391 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 367 [2021-06-05 04:15:49,501 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 233 [2021-06-05 04:15:50,717 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 191 [2021-06-05 04:15:50,868 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 236 [2021-06-05 04:15:51,101 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 275 [2021-06-05 04:15:51,454 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 297 [2021-06-05 04:15:51,855 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 336 [2021-06-05 04:15:52,709 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 520 [2021-06-05 04:15:54,026 WARN L205 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 867 DAG size of output: 562 [2021-06-05 04:15:55,082 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 898 DAG size of output: 565 [2021-06-05 04:15:57,356 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-06-05 04:15:59,610 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 1765 DAG size of output: 1009 [2021-06-05 04:16:02,014 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 1772 DAG size of output: 1016 [2021-06-05 04:16:04,655 WARN L205 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 1018 DAG size of output: 1191 [2021-06-05 04:16:04,963 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 698 [2021-06-05 04:16:05,548 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 575 [2021-06-05 04:16:05,800 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 518 [2021-06-05 04:16:06,745 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 241 [2021-06-05 04:16:06,911 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 268 [2021-06-05 04:16:07,175 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-06-05 04:16:07,439 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 370 [2021-06-05 04:16:07,668 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 334 [2021-06-05 04:16:08,509 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 789 DAG size of output: 336 [2021-06-05 04:16:09,319 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-06-05 04:16:09,441 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 247 [2021-06-05 04:16:09,568 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 252 [2021-06-05 04:16:09,682 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 253 [2021-06-05 04:16:10,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:16:10,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:16:10,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:16:10,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:16:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:10,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788670276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:10,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:10,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 04:16:10,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959651374] [2021-06-05 04:16:10,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 04:16:10,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:10,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 04:16:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:16:10,502 INFO L87 Difference]: Start difference. First operand 1892 states and 6438 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:16:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:10,843 INFO L93 Difference]: Finished difference Result 2152 states and 7005 transitions. [2021-06-05 04:16:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:16:10,844 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-06-05 04:16:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:10,847 INFO L225 Difference]: With dead ends: 2152 [2021-06-05 04:16:10,847 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 04:16:10,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:16:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 04:16:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-06-05 04:16:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.403903903903904) internal successors, (6801), 1998 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6801 transitions. [2021-06-05 04:16:10,873 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6801 transitions. Word has length 21 [2021-06-05 04:16:10,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:10,873 INFO L482 AbstractCegarLoop]: Abstraction has 1999 states and 6801 transitions. [2021-06-05 04:16:10,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 04:16:10,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6801 transitions. [2021-06-05 04:16:10,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:10,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:10,875 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:11,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19836,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:11,089 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1614345671, now seen corresponding path program 80 times [2021-06-05 04:16:11,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:11,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124417796] [2021-06-05 04:16:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:11,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:11,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124417796] [2021-06-05 04:16:11,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124417796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:11,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473036442] [2021-06-05 04:16:11,170 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:16:11,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:11,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:11,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:11,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:11,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473036442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:11,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:11,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:16:11,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171186553] [2021-06-05 04:16:11,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:16:11,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:11,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:16:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:11,237 INFO L87 Difference]: Start difference. First operand 1999 states and 6801 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:16:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:11,397 INFO L93 Difference]: Finished difference Result 2169 states and 6986 transitions. [2021-06-05 04:16:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:16:11,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:16:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:11,400 INFO L225 Difference]: With dead ends: 2169 [2021-06-05 04:16:11,400 INFO L226 Difference]: Without dead ends: 2169 [2021-06-05 04:16:11,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:16:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-05 04:16:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1932. [2021-06-05 04:16:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.3858104609010877) internal successors, (6538), 1931 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6538 transitions. [2021-06-05 04:16:11,423 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6538 transitions. Word has length 22 [2021-06-05 04:16:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:11,423 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6538 transitions. [2021-06-05 04:16:11,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:16:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6538 transitions. [2021-06-05 04:16:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:11,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:11,425 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:11,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21446 [2021-06-05 04:16:11,626 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:11,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1020889444, now seen corresponding path program 81 times [2021-06-05 04:16:11,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:11,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805691584] [2021-06-05 04:16:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:11,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:11,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805691584] [2021-06-05 04:16:11,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805691584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:11,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71017482] [2021-06-05 04:16:11,705 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 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 04:16:11,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:16:11,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:11,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:11,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:11,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71017482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:11,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:11,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:16:11,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506517853] [2021-06-05 04:16:11,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:16:11,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:11,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:16:11,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:11,769 INFO L87 Difference]: Start difference. First operand 1932 states and 6538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:16:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:12,066 INFO L93 Difference]: Finished difference Result 2262 states and 7074 transitions. [2021-06-05 04:16:12,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:16:12,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:16:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:12,070 INFO L225 Difference]: With dead ends: 2262 [2021-06-05 04:16:12,070 INFO L226 Difference]: Without dead ends: 2255 [2021-06-05 04:16:12,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:16:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-06-05 04:16:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1969. [2021-06-05 04:16:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.374491869918699) internal successors, (6641), 1968 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6641 transitions. [2021-06-05 04:16:12,100 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6641 transitions. Word has length 22 [2021-06-05 04:16:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:12,100 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6641 transitions. [2021-06-05 04:16:12,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:16:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6641 transitions. [2021-06-05 04:16:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:12,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:12,103 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:12,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21447 [2021-06-05 04:16:12,317 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:12,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1440007587, now seen corresponding path program 82 times [2021-06-05 04:16:12,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:12,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292613630] [2021-06-05 04:16:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:12,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292613630] [2021-06-05 04:16:12,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292613630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098315439] [2021-06-05 04:16:12,382 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 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 04:16:12,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:12,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:12,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:12,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098315439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:12,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:12,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283314719] [2021-06-05 04:16:12,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:12,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:12,438 INFO L87 Difference]: Start difference. First operand 1969 states and 6641 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:12,577 INFO L93 Difference]: Finished difference Result 2016 states and 6708 transitions. [2021-06-05 04:16:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:12,578 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:12,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:12,581 INFO L225 Difference]: With dead ends: 2016 [2021-06-05 04:16:12,581 INFO L226 Difference]: Without dead ends: 2015 [2021-06-05 04:16:12,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-06-05 04:16:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-06-05 04:16:12,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3719512195121952) internal successors, (6636), 1968 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6636 transitions. [2021-06-05 04:16:12,606 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6636 transitions. Word has length 22 [2021-06-05 04:16:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:12,607 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6636 transitions. [2021-06-05 04:16:12,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6636 transitions. [2021-06-05 04:16:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:12,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:12,609 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:12,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21448,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:12,810 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:12,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:12,810 INFO L82 PathProgramCache]: Analyzing trace with hash -517588854, now seen corresponding path program 83 times [2021-06-05 04:16:12,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:12,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574192438] [2021-06-05 04:16:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:12,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:12,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574192438] [2021-06-05 04:16:12,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574192438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91621247] [2021-06-05 04:16:12,895 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 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 04:16:12,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:16:12,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:12,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:12,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:12,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91621247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:12,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:12,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492211141] [2021-06-05 04:16:12,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:12,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:12,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:12,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:12,959 INFO L87 Difference]: Start difference. First operand 1969 states and 6636 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:13,057 INFO L93 Difference]: Finished difference Result 2320 states and 7225 transitions. [2021-06-05 04:16:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:16:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:13,062 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 04:16:13,062 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 04:16:13,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 04:16:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-06-05 04:16:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.3628779979144943) internal successors, (6450), 1918 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6450 transitions. [2021-06-05 04:16:13,087 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6450 transitions. Word has length 22 [2021-06-05 04:16:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:13,087 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 6450 transitions. [2021-06-05 04:16:13,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6450 transitions. [2021-06-05 04:16:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:13,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:13,089 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:13,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21449 [2021-06-05 04:16:13,309 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:13,310 INFO L82 PathProgramCache]: Analyzing trace with hash -408136825, now seen corresponding path program 84 times [2021-06-05 04:16:13,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:13,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596809234] [2021-06-05 04:16:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:13,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596809234] [2021-06-05 04:16:13,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596809234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027901019] [2021-06-05 04:16:13,380 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 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 04:16:13,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:16:13,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:13,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027901019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:13,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:13,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:13,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105022509] [2021-06-05 04:16:13,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:13,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:13,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:13,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:13,447 INFO L87 Difference]: Start difference. First operand 1919 states and 6450 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:13,566 INFO L93 Difference]: Finished difference Result 2210 states and 6903 transitions. [2021-06-05 04:16:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:16:13,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:13,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:13,569 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 04:16:13,569 INFO L226 Difference]: Without dead ends: 2210 [2021-06-05 04:16:13,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:13,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-06-05 04:16:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1916. [2021-06-05 04:16:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 3.3383812010443865) internal successors, (6393), 1915 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 6393 transitions. [2021-06-05 04:16:13,593 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 6393 transitions. Word has length 22 [2021-06-05 04:16:13,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:13,593 INFO L482 AbstractCegarLoop]: Abstraction has 1916 states and 6393 transitions. [2021-06-05 04:16:13,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 6393 transitions. [2021-06-05 04:16:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:13,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:13,596 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:13,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:13,796 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:13,796 INFO L82 PathProgramCache]: Analyzing trace with hash 675153308, now seen corresponding path program 85 times [2021-06-05 04:16:13,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:13,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824474919] [2021-06-05 04:16:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:13,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:13,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824474919] [2021-06-05 04:16:13,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824474919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:13,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614374999] [2021-06-05 04:16:13,855 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:16:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:13,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:13,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614374999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:13,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:13,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:13,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243181494] [2021-06-05 04:16:13,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:13,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:13,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:13,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:13,923 INFO L87 Difference]: Start difference. First operand 1916 states and 6393 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:14,064 INFO L93 Difference]: Finished difference Result 2207 states and 6832 transitions. [2021-06-05 04:16:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:14,066 INFO L225 Difference]: With dead ends: 2207 [2021-06-05 04:16:14,066 INFO L226 Difference]: Without dead ends: 2205 [2021-06-05 04:16:14,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-05 04:16:14,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1928. [2021-06-05 04:16:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.3388687078360144) internal successors, (6434), 1927 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6434 transitions. [2021-06-05 04:16:14,089 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6434 transitions. Word has length 22 [2021-06-05 04:16:14,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:14,089 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6434 transitions. [2021-06-05 04:16:14,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6434 transitions. [2021-06-05 04:16:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:14,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:14,091 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:14,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21451 [2021-06-05 04:16:14,301 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1331955485, now seen corresponding path program 86 times [2021-06-05 04:16:14,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:14,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986124350] [2021-06-05 04:16:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:14,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986124350] [2021-06-05 04:16:14,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986124350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:14,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131967028] [2021-06-05 04:16:14,363 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 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 04:16:14,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:14,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:14,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131967028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:14,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:14,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:14,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250507827] [2021-06-05 04:16:14,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:14,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:14,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:14,417 INFO L87 Difference]: Start difference. First operand 1928 states and 6434 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:14,560 INFO L93 Difference]: Finished difference Result 2091 states and 6657 transitions. [2021-06-05 04:16:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:14,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:14,563 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 04:16:14,563 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 04:16:14,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 04:16:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-06-05 04:16:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3400317292437864) internal successors, (6316), 1891 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6316 transitions. [2021-06-05 04:16:14,585 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6316 transitions. Word has length 22 [2021-06-05 04:16:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:14,585 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6316 transitions. [2021-06-05 04:16:14,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6316 transitions. [2021-06-05 04:16:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:14,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:14,587 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:14,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21452 [2021-06-05 04:16:14,800 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2040593078, now seen corresponding path program 87 times [2021-06-05 04:16:14,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:14,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042499655] [2021-06-05 04:16:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:14,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:14,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042499655] [2021-06-05 04:16:14,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042499655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:14,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282056681] [2021-06-05 04:16:14,859 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 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 04:16:14,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:16:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:14,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282056681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:14,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:14,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:14,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101944378] [2021-06-05 04:16:14,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:14,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:14,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:14,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:14,925 INFO L87 Difference]: Start difference. First operand 1892 states and 6316 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:14,987 INFO L93 Difference]: Finished difference Result 2273 states and 6960 transitions. [2021-06-05 04:16:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:16:14,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:14,990 INFO L225 Difference]: With dead ends: 2273 [2021-06-05 04:16:14,990 INFO L226 Difference]: Without dead ends: 2273 [2021-06-05 04:16:14,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-06-05 04:16:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-06-05 04:16:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3393139841688653) internal successors, (6328), 1895 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6328 transitions. [2021-06-05 04:16:15,011 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6328 transitions. Word has length 22 [2021-06-05 04:16:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:15,011 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6328 transitions. [2021-06-05 04:16:15,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:15,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6328 transitions. [2021-06-05 04:16:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:15,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:15,014 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:15,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:15,214 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1252398503, now seen corresponding path program 88 times [2021-06-05 04:16:15,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:15,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491156728] [2021-06-05 04:16:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:15,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:15,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491156728] [2021-06-05 04:16:15,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491156728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:15,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043285523] [2021-06-05 04:16:15,281 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 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 04:16:15,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:15,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:15,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:15,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:15,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043285523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:15,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:15,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:15,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579189882] [2021-06-05 04:16:15,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:15,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:15,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:15,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:15,343 INFO L87 Difference]: Start difference. First operand 1896 states and 6328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:15,516 INFO L93 Difference]: Finished difference Result 2019 states and 6507 transitions. [2021-06-05 04:16:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:16:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:15,518 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 04:16:15,519 INFO L226 Difference]: Without dead ends: 2017 [2021-06-05 04:16:15,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-06-05 04:16:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-06-05 04:16:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3366754617414247) internal successors, (6323), 1895 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6323 transitions. [2021-06-05 04:16:15,539 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6323 transitions. Word has length 22 [2021-06-05 04:16:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:15,539 INFO L482 AbstractCegarLoop]: Abstraction has 1896 states and 6323 transitions. [2021-06-05 04:16:15,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6323 transitions. [2021-06-05 04:16:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:15,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:15,542 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:15,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21454,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:15,742 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:15,742 INFO L82 PathProgramCache]: Analyzing trace with hash 525326884, now seen corresponding path program 89 times [2021-06-05 04:16:15,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:15,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528556546] [2021-06-05 04:16:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:15,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:15,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528556546] [2021-06-05 04:16:15,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528556546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:15,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729942734] [2021-06-05 04:16:15,808 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 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 04:16:15,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:16:15,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:15,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:15,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:15,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729942734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:15,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:15,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:15,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870161286] [2021-06-05 04:16:15,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:15,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:15,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:15,877 INFO L87 Difference]: Start difference. First operand 1896 states and 6323 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:15,954 INFO L93 Difference]: Finished difference Result 2414 states and 7311 transitions. [2021-06-05 04:16:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:16:15,954 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:15,957 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 04:16:15,957 INFO L226 Difference]: Without dead ends: 2414 [2021-06-05 04:16:15,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-05 04:16:15,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-06-05 04:16:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3266413456321215) internal successors, (6131), 1843 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6131 transitions. [2021-06-05 04:16:15,985 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6131 transitions. Word has length 22 [2021-06-05 04:16:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:15,985 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 6131 transitions. [2021-06-05 04:16:15,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6131 transitions. [2021-06-05 04:16:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:15,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:15,988 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:16,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21455 [2021-06-05 04:16:16,201 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:16,201 INFO L82 PathProgramCache]: Analyzing trace with hash -376627513, now seen corresponding path program 90 times [2021-06-05 04:16:16,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:16,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645185354] [2021-06-05 04:16:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:16,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:16,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645185354] [2021-06-05 04:16:16,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645185354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:16,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659762626] [2021-06-05 04:16:16,263 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 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 04:16:16,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:16:16,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:16,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:16,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659762626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:16,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:16,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:16,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335410301] [2021-06-05 04:16:16,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:16,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:16,329 INFO L87 Difference]: Start difference. First operand 1844 states and 6131 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:16,443 INFO L93 Difference]: Finished difference Result 2122 states and 6550 transitions. [2021-06-05 04:16:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:16:16,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:16,446 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 04:16:16,446 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 04:16:16,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:16:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 04:16:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1806. [2021-06-05 04:16:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 3.301939058171745) internal successors, (5960), 1805 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 5960 transitions. [2021-06-05 04:16:16,466 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 5960 transitions. Word has length 22 [2021-06-05 04:16:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:16,466 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 5960 transitions. [2021-06-05 04:16:16,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 5960 transitions. [2021-06-05 04:16:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:16,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:16,469 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:16,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21456 [2021-06-05 04:16:16,681 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash 706662620, now seen corresponding path program 91 times [2021-06-05 04:16:16,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:16,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268017880] [2021-06-05 04:16:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:16,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:16,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268017880] [2021-06-05 04:16:16,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268017880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:16,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243888617] [2021-06-05 04:16:16,742 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 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 04:16:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:16,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243888617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:16,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:16,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:16,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253761561] [2021-06-05 04:16:16,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:16,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:16,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:16,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:16,798 INFO L87 Difference]: Start difference. First operand 1806 states and 5960 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:16,947 INFO L93 Difference]: Finished difference Result 2095 states and 6396 transitions. [2021-06-05 04:16:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:16,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:16,950 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 04:16:16,950 INFO L226 Difference]: Without dead ends: 2093 [2021-06-05 04:16:16,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-06-05 04:16:16,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1820. [2021-06-05 04:16:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.302363936228697) internal successors, (6007), 1819 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6007 transitions. [2021-06-05 04:16:16,971 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6007 transitions. Word has length 22 [2021-06-05 04:16:16,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:16,971 INFO L482 AbstractCegarLoop]: Abstraction has 1820 states and 6007 transitions. [2021-06-05 04:16:16,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:16,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6007 transitions. [2021-06-05 04:16:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:16,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:16,973 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:17,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21457 [2021-06-05 04:16:17,174 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1363464797, now seen corresponding path program 92 times [2021-06-05 04:16:17,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:17,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665129729] [2021-06-05 04:16:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:17,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:17,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665129729] [2021-06-05 04:16:17,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665129729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:17,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994491455] [2021-06-05 04:16:17,233 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:16:17,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:17,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994491455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:17,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:17,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:17,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833568014] [2021-06-05 04:16:17,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:17,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:17,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:17,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:17,297 INFO L87 Difference]: Start difference. First operand 1820 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:17,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:17,440 INFO L93 Difference]: Finished difference Result 1994 states and 6249 transitions. [2021-06-05 04:16:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:17,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:17,442 INFO L225 Difference]: With dead ends: 1994 [2021-06-05 04:16:17,442 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 04:16:17,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 04:16:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-06-05 04:16:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.3002207505518766) internal successors, (5980), 1812 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5980 transitions. [2021-06-05 04:16:17,464 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5980 transitions. Word has length 22 [2021-06-05 04:16:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:17,465 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5980 transitions. [2021-06-05 04:16:17,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5980 transitions. [2021-06-05 04:16:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:17,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:17,467 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:17,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21458 [2021-06-05 04:16:17,669 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:17,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2009083766, now seen corresponding path program 93 times [2021-06-05 04:16:17,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:17,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253206474] [2021-06-05 04:16:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:17,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:17,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253206474] [2021-06-05 04:16:17,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253206474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:17,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021275664] [2021-06-05 04:16:17,733 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 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 04:16:17,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:16:17,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:17,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:17,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:17,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021275664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:17,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:17,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:17,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132512695] [2021-06-05 04:16:17,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:17,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:17,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:17,796 INFO L87 Difference]: Start difference. First operand 1813 states and 5980 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:17,857 INFO L93 Difference]: Finished difference Result 2201 states and 6640 transitions. [2021-06-05 04:16:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:16:17,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:17,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:17,860 INFO L225 Difference]: With dead ends: 2201 [2021-06-05 04:16:17,860 INFO L226 Difference]: Without dead ends: 2201 [2021-06-05 04:16:17,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:17,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-06-05 04:16:17,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-06-05 04:16:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.299724517906336) internal successors, (5989), 1815 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5989 transitions. [2021-06-05 04:16:17,881 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5989 transitions. Word has length 22 [2021-06-05 04:16:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:17,881 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5989 transitions. [2021-06-05 04:16:17,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5989 transitions. [2021-06-05 04:16:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:17,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:17,883 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:18,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21459,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:18,084 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1220889191, now seen corresponding path program 94 times [2021-06-05 04:16:18,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:18,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385059676] [2021-06-05 04:16:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:18,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:18,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385059676] [2021-06-05 04:16:18,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385059676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:18,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65958834] [2021-06-05 04:16:18,154 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 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 04:16:18,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:18,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:18,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:18,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65958834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:18,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:18,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478072065] [2021-06-05 04:16:18,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:18,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:18,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:18,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:18,229 INFO L87 Difference]: Start difference. First operand 1816 states and 5989 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:18,418 INFO L93 Difference]: Finished difference Result 1990 states and 6234 transitions. [2021-06-05 04:16:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:16:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:18,420 INFO L225 Difference]: With dead ends: 1990 [2021-06-05 04:16:18,420 INFO L226 Difference]: Without dead ends: 1988 [2021-06-05 04:16:18,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-06-05 04:16:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-06-05 04:16:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.296969696969697) internal successors, (5984), 1815 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:18,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5984 transitions. [2021-06-05 04:16:18,441 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5984 transitions. Word has length 22 [2021-06-05 04:16:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:18,441 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 5984 transitions. [2021-06-05 04:16:18,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5984 transitions. [2021-06-05 04:16:18,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:18,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:18,444 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:18,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21460,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:18,649 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:18,649 INFO L82 PathProgramCache]: Analyzing trace with hash 556836196, now seen corresponding path program 95 times [2021-06-05 04:16:18,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:18,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584314796] [2021-06-05 04:16:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:18,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:18,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584314796] [2021-06-05 04:16:18,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584314796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071197214] [2021-06-05 04:16:18,719 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 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 04:16:18,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:16:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:18,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071197214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:18,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:18,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:18,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314339447] [2021-06-05 04:16:18,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:18,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:18,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:18,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:18,821 INFO L87 Difference]: Start difference. First operand 1816 states and 5984 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:18,905 INFO L93 Difference]: Finished difference Result 2351 states and 6997 transitions. [2021-06-05 04:16:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:16:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:18,908 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 04:16:18,908 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 04:16:18,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 04:16:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-06-05 04:16:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2830613393359593) internal successors, (5834), 1777 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5834 transitions. [2021-06-05 04:16:18,946 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5834 transitions. Word has length 22 [2021-06-05 04:16:18,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:18,946 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 5834 transitions. [2021-06-05 04:16:18,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:18,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5834 transitions. [2021-06-05 04:16:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:18,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:18,950 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:19,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21461 [2021-06-05 04:16:19,161 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:19,161 INFO L82 PathProgramCache]: Analyzing trace with hash 268515805, now seen corresponding path program 96 times [2021-06-05 04:16:19,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:19,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695604702] [2021-06-05 04:16:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:19,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:19,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695604702] [2021-06-05 04:16:19,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695604702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:19,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645596608] [2021-06-05 04:16:19,257 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 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 04:16:19,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:16:19,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:19,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:19,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:19,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645596608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:19,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:19,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:19,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191068574] [2021-06-05 04:16:19,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:19,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:19,323 INFO L87 Difference]: Start difference. First operand 1778 states and 5834 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:19,519 INFO L93 Difference]: Finished difference Result 1995 states and 6375 transitions. [2021-06-05 04:16:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:19,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:19,522 INFO L225 Difference]: With dead ends: 1995 [2021-06-05 04:16:19,522 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 04:16:19,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 04:16:19,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-06-05 04:16:19,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2824256035934867) internal successors, (5846), 1781 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5846 transitions. [2021-06-05 04:16:19,540 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5846 transitions. Word has length 22 [2021-06-05 04:16:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:19,540 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 5846 transitions. [2021-06-05 04:16:19,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5846 transitions. [2021-06-05 04:16:19,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:19,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:19,542 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:19,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21462 [2021-06-05 04:16:19,749 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1504023606, now seen corresponding path program 97 times [2021-06-05 04:16:19,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:19,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517230739] [2021-06-05 04:16:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:19,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:19,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517230739] [2021-06-05 04:16:19,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517230739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:19,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519792346] [2021-06-05 04:16:19,822 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 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 04:16:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:19,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:19,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:19,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519792346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:19,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:19,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:19,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801356372] [2021-06-05 04:16:19,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:19,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:19,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:19,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:19,904 INFO L87 Difference]: Start difference. First operand 1782 states and 5846 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:20,045 INFO L93 Difference]: Finished difference Result 3202 states and 10128 transitions. [2021-06-05 04:16:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:16:20,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:20,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:20,062 INFO L225 Difference]: With dead ends: 3202 [2021-06-05 04:16:20,062 INFO L226 Difference]: Without dead ends: 3202 [2021-06-05 04:16:20,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:16:20,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-06-05 04:16:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-06-05 04:16:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.433227344992051) internal successors, (8638), 2516 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8638 transitions. [2021-06-05 04:16:20,092 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8638 transitions. Word has length 22 [2021-06-05 04:16:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:20,092 INFO L482 AbstractCegarLoop]: Abstraction has 2517 states and 8638 transitions. [2021-06-05 04:16:20,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8638 transitions. [2021-06-05 04:16:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:20,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:20,094 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:20,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21463,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:20,295 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:20,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:20,295 INFO L82 PathProgramCache]: Analyzing trace with hash 600161159, now seen corresponding path program 98 times [2021-06-05 04:16:20,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:20,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198939397] [2021-06-05 04:16:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:20,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:20,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198939397] [2021-06-05 04:16:20,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198939397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:20,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080997013] [2021-06-05 04:16:20,396 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 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 04:16:20,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:20,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:20,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:20,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080997013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:20,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:20,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:20,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035065696] [2021-06-05 04:16:20,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:20,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:20,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:20,510 INFO L87 Difference]: Start difference. First operand 2517 states and 8638 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:20,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:20,668 INFO L93 Difference]: Finished difference Result 2785 states and 8985 transitions. [2021-06-05 04:16:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:20,668 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:20,671 INFO L225 Difference]: With dead ends: 2785 [2021-06-05 04:16:20,671 INFO L226 Difference]: Without dead ends: 2785 [2021-06-05 04:16:20,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:16:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-06-05 04:16:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2437. [2021-06-05 04:16:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.3973727422003286) internal successors, (8276), 2436 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8276 transitions. [2021-06-05 04:16:20,723 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8276 transitions. Word has length 22 [2021-06-05 04:16:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:20,723 INFO L482 AbstractCegarLoop]: Abstraction has 2437 states and 8276 transitions. [2021-06-05 04:16:20,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8276 transitions. [2021-06-05 04:16:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:20,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:20,725 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:20,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21464 [2021-06-05 04:16:20,952 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:20,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:20,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1683451292, now seen corresponding path program 99 times [2021-06-05 04:16:20,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:20,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981164971] [2021-06-05 04:16:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:21,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:21,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981164971] [2021-06-05 04:16:21,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981164971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:21,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518586647] [2021-06-05 04:16:21,017 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 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 04:16:21,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:16:21,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:21,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:21,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518586647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:21,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:21,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:21,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516414833] [2021-06-05 04:16:21,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:21,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:21,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:21,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:21,085 INFO L87 Difference]: Start difference. First operand 2437 states and 8276 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:21,258 INFO L93 Difference]: Finished difference Result 2747 states and 8798 transitions. [2021-06-05 04:16:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:21,261 INFO L225 Difference]: With dead ends: 2747 [2021-06-05 04:16:21,262 INFO L226 Difference]: Without dead ends: 2745 [2021-06-05 04:16:21,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-06-05 04:16:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2476. [2021-06-05 04:16:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-06-05 04:16:21,293 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-06-05 04:16:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:21,293 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-06-05 04:16:21,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-06-05 04:16:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:21,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:21,295 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:21,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21465,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:21,496 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1954713827, now seen corresponding path program 100 times [2021-06-05 04:16:21,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:21,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351917678] [2021-06-05 04:16:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:21,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:21,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351917678] [2021-06-05 04:16:21,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351917678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:21,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216193363] [2021-06-05 04:16:21,566 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 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 04:16:21,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:21,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:21,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:21,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:21,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216193363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:21,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:21,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:21,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617512156] [2021-06-05 04:16:21,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:21,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:21,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:21,629 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:21,792 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-06-05 04:16:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:21,796 INFO L225 Difference]: With dead ends: 2659 [2021-06-05 04:16:21,796 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 04:16:21,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 04:16:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-06-05 04:16:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-06-05 04:16:21,825 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-06-05 04:16:21,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:21,825 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-06-05 04:16:21,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:21,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-06-05 04:16:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:21,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:21,827 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:22,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21466 [2021-06-05 04:16:22,044 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:22,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1032295094, now seen corresponding path program 101 times [2021-06-05 04:16:22,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:22,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603033987] [2021-06-05 04:16:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:22,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:22,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603033987] [2021-06-05 04:16:22,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603033987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472726022] [2021-06-05 04:16:22,170 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 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 04:16:22,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:16:22,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:22,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:22,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472726022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:22,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:22,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:22,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846229125] [2021-06-05 04:16:22,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:22,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:22,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:22,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:22,251 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:22,313 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-06-05 04:16:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:16:22,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:22,316 INFO L225 Difference]: With dead ends: 2808 [2021-06-05 04:16:22,316 INFO L226 Difference]: Without dead ends: 2808 [2021-06-05 04:16:22,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-06-05 04:16:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-06-05 04:16:22,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-06-05 04:16:22,346 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-06-05 04:16:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:22,346 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-06-05 04:16:22,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:22,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-06-05 04:16:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:22,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:22,348 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:22,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21467 [2021-06-05 04:16:22,572 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:22,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:22,572 INFO L82 PathProgramCache]: Analyzing trace with hash -244100519, now seen corresponding path program 102 times [2021-06-05 04:16:22,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:22,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450276504] [2021-06-05 04:16:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:22,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:22,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450276504] [2021-06-05 04:16:22,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450276504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:22,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283843419] [2021-06-05 04:16:22,652 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 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 04:16:22,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:16:22,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:22,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:22,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:22,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283843419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:22,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:22,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:22,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097462122] [2021-06-05 04:16:22,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:22,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:22,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:22,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:22,744 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:22,916 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-06-05 04:16:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:16:22,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:22,920 INFO L225 Difference]: With dead ends: 2648 [2021-06-05 04:16:22,920 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 04:16:22,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 04:16:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-06-05 04:16:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-06-05 04:16:22,950 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-06-05 04:16:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:22,950 INFO L482 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-06-05 04:16:22,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-06-05 04:16:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:22,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:22,952 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:23,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21468 [2021-06-05 04:16:23,153 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:23,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:23,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1533624868, now seen corresponding path program 103 times [2021-06-05 04:16:23,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:23,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115868318] [2021-06-05 04:16:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:23,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:23,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115868318] [2021-06-05 04:16:23,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115868318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:23,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070646393] [2021-06-05 04:16:23,212 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 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 04:16:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:23,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:23,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:23,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070646393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:23,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:23,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:23,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335684710] [2021-06-05 04:16:23,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:23,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:23,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:23,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:23,292 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:23,374 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-06-05 04:16:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:16:23,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:23,378 INFO L225 Difference]: With dead ends: 2940 [2021-06-05 04:16:23,378 INFO L226 Difference]: Without dead ends: 2940 [2021-06-05 04:16:23,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-06-05 04:16:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-06-05 04:16:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-06-05 04:16:23,406 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-06-05 04:16:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:23,406 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-06-05 04:16:23,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-06-05 04:16:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:23,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:23,409 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:23,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21469 [2021-06-05 04:16:23,619 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1245304477, now seen corresponding path program 104 times [2021-06-05 04:16:23,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:23,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172194495] [2021-06-05 04:16:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:23,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:23,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172194495] [2021-06-05 04:16:23,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172194495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:23,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283503866] [2021-06-05 04:16:23,683 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 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 04:16:23,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:23,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:23,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:23,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:23,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283503866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:23,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:23,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:23,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611200531] [2021-06-05 04:16:23,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:23,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:23,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:23,744 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:23,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:23,892 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-06-05 04:16:23,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:23,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:23,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:23,895 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 04:16:23,895 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 04:16:23,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 04:16:23,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-06-05 04:16:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-06-05 04:16:23,922 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-06-05 04:16:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:23,922 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-06-05 04:16:23,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-06-05 04:16:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:23,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:23,924 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:24,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21470,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:24,124 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash -527234934, now seen corresponding path program 105 times [2021-06-05 04:16:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:24,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184754810] [2021-06-05 04:16:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:24,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:24,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184754810] [2021-06-05 04:16:24,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184754810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:24,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8507410] [2021-06-05 04:16:24,185 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 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 04:16:24,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:16:24,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:24,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:24,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:24,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8507410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:24,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:24,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:24,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704627458] [2021-06-05 04:16:24,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:24,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:24,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:24,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:24,253 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:24,340 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-06-05 04:16:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:16:24,340 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:24,345 INFO L225 Difference]: With dead ends: 4123 [2021-06-05 04:16:24,345 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 04:16:24,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:16:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 04:16:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-06-05 04:16:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-06-05 04:16:24,408 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-06-05 04:16:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:24,408 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-06-05 04:16:24,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-06-05 04:16:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:24,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:24,411 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:24,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21471,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:24,611 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:24,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:24,611 INFO L82 PathProgramCache]: Analyzing trace with hash 172219097, now seen corresponding path program 106 times [2021-06-05 04:16:24,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:24,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276962547] [2021-06-05 04:16:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:24,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:24,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276962547] [2021-06-05 04:16:24,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276962547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:24,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736395869] [2021-06-05 04:16:24,672 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 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 04:16:24,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:24,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:24,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:24,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736395869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:24,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:24,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:24,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933744630] [2021-06-05 04:16:24,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:24,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:24,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:24,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:24,745 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:24,909 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-06-05 04:16:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:16:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:24,914 INFO L225 Difference]: With dead ends: 3810 [2021-06-05 04:16:24,914 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 04:16:24,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 04:16:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-06-05 04:16:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-06-05 04:16:24,960 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-06-05 04:16:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:24,960 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-06-05 04:16:24,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-06-05 04:16:24,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:24,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:24,963 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:25,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21472,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:25,163 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:25,163 INFO L82 PathProgramCache]: Analyzing trace with hash 10620644, now seen corresponding path program 107 times [2021-06-05 04:16:25,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:25,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428374859] [2021-06-05 04:16:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:25,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:25,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428374859] [2021-06-05 04:16:25,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428374859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:25,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702198784] [2021-06-05 04:16:25,229 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 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 04:16:25,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:16:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:25,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702198784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:25,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:25,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:25,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556619327] [2021-06-05 04:16:25,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:25,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:25,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:25,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:25,299 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:25,442 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-06-05 04:16:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:16:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:25,449 INFO L225 Difference]: With dead ends: 5567 [2021-06-05 04:16:25,450 INFO L226 Difference]: Without dead ends: 5567 [2021-06-05 04:16:25,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-06-05 04:16:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-06-05 04:16:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-06-05 04:16:25,523 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-06-05 04:16:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:25,524 INFO L482 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-06-05 04:16:25,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-06-05 04:16:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:25,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:25,527 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:25,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21473,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:25,728 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:25,728 INFO L82 PathProgramCache]: Analyzing trace with hash 815838919, now seen corresponding path program 108 times [2021-06-05 04:16:25,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:25,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893415701] [2021-06-05 04:16:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:25,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:25,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893415701] [2021-06-05 04:16:25,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893415701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:25,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536007514] [2021-06-05 04:16:25,785 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 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 04:16:25,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:16:25,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:25,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:25,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536007514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:25,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:25,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:25,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10067732] [2021-06-05 04:16:25,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:25,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:25,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:25,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:25,857 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:25,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:25,956 INFO L93 Difference]: Finished difference Result 5072 states and 17481 transitions. [2021-06-05 04:16:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:16:25,956 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:25,962 INFO L225 Difference]: With dead ends: 5072 [2021-06-05 04:16:25,962 INFO L226 Difference]: Without dead ends: 5072 [2021-06-05 04:16:25,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:16:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-06-05 04:16:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4661. [2021-06-05 04:16:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 3.5489270386266094) internal successors, (16538), 4660 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 16538 transitions. [2021-06-05 04:16:26,023 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 16538 transitions. Word has length 22 [2021-06-05 04:16:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:26,023 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 16538 transitions. [2021-06-05 04:16:26,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 16538 transitions. [2021-06-05 04:16:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:26,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:26,027 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:26,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21474 [2021-06-05 04:16:26,227 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:26,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1899129052, now seen corresponding path program 109 times [2021-06-05 04:16:26,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:26,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207211319] [2021-06-05 04:16:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:26,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207211319] [2021-06-05 04:16:26,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207211319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:26,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962235707] [2021-06-05 04:16:26,284 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 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 04:16:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:26,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962235707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:26,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:26,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:26,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862945126] [2021-06-05 04:16:26,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:26,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:26,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:26,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:26,340 INFO L87 Difference]: Start difference. First operand 4661 states and 16538 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:26,509 INFO L93 Difference]: Finished difference Result 5066 states and 17441 transitions. [2021-06-05 04:16:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:26,516 INFO L225 Difference]: With dead ends: 5066 [2021-06-05 04:16:26,516 INFO L226 Difference]: Without dead ends: 5064 [2021-06-05 04:16:26,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:26,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-05 04:16:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4803. [2021-06-05 04:16:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.546022490628905) internal successors, (17028), 4802 states have internal predecessors, (17028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 17028 transitions. [2021-06-05 04:16:26,592 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 17028 transitions. Word has length 22 [2021-06-05 04:16:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:26,592 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 17028 transitions. [2021-06-05 04:16:26,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 17028 transitions. [2021-06-05 04:16:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:26,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:26,597 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:26,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21475,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:26,813 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1739036067, now seen corresponding path program 110 times [2021-06-05 04:16:26,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:26,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455925820] [2021-06-05 04:16:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:26,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:26,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455925820] [2021-06-05 04:16:26,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455925820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:26,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763592064] [2021-06-05 04:16:26,876 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 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 04:16:26,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:26,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:26,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763592064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:26,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:26,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:26,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730737102] [2021-06-05 04:16:26,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:26,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:26,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:26,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:26,933 INFO L87 Difference]: Start difference. First operand 4803 states and 17028 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:27,097 INFO L93 Difference]: Finished difference Result 5001 states and 17312 transitions. [2021-06-05 04:16:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:27,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:27,104 INFO L225 Difference]: With dead ends: 5001 [2021-06-05 04:16:27,104 INFO L226 Difference]: Without dead ends: 4999 [2021-06-05 04:16:27,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-06-05 04:16:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4791. [2021-06-05 04:16:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 4790 states have (on average 3.5361169102296452) internal successors, (16938), 4790 states have internal predecessors, (16938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 16938 transitions. [2021-06-05 04:16:27,176 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 16938 transitions. Word has length 22 [2021-06-05 04:16:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:27,176 INFO L482 AbstractCegarLoop]: Abstraction has 4791 states and 16938 transitions. [2021-06-05 04:16:27,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 16938 transitions. [2021-06-05 04:16:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:27,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:27,180 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:27,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21476 [2021-06-05 04:16:27,381 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:27,381 INFO L82 PathProgramCache]: Analyzing trace with hash -816617334, now seen corresponding path program 111 times [2021-06-05 04:16:27,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:27,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973945640] [2021-06-05 04:16:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:27,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:27,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973945640] [2021-06-05 04:16:27,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973945640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:27,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757908438] [2021-06-05 04:16:27,441 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 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 04:16:27,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:16:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:27,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757908438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:27,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:27,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:27,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253756715] [2021-06-05 04:16:27,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:27,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:27,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:27,514 INFO L87 Difference]: Start difference. First operand 4791 states and 16938 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:27,597 INFO L93 Difference]: Finished difference Result 5161 states and 17507 transitions. [2021-06-05 04:16:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:16:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:27,605 INFO L225 Difference]: With dead ends: 5161 [2021-06-05 04:16:27,605 INFO L226 Difference]: Without dead ends: 5161 [2021-06-05 04:16:27,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-06-05 04:16:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4811. [2021-06-05 04:16:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.51995841995842) internal successors, (16931), 4810 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16931 transitions. [2021-06-05 04:16:27,681 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16931 transitions. Word has length 22 [2021-06-05 04:16:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:27,681 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16931 transitions. [2021-06-05 04:16:27,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16931 transitions. [2021-06-05 04:16:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:27,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:27,685 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:27,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21477 [2021-06-05 04:16:27,886 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash -28422759, now seen corresponding path program 112 times [2021-06-05 04:16:27,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:27,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929268622] [2021-06-05 04:16:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:27,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:27,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929268622] [2021-06-05 04:16:27,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929268622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:27,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324543996] [2021-06-05 04:16:27,945 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 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 04:16:27,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:27,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:28,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324543996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:28,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:28,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:28,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402855821] [2021-06-05 04:16:28,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:28,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:28,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:28,009 INFO L87 Difference]: Start difference. First operand 4811 states and 16931 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:28,180 INFO L93 Difference]: Finished difference Result 5011 states and 17220 transitions. [2021-06-05 04:16:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:16:28,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:28,187 INFO L225 Difference]: With dead ends: 5011 [2021-06-05 04:16:28,187 INFO L226 Difference]: Without dead ends: 5009 [2021-06-05 04:16:28,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-06-05 04:16:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 4811. [2021-06-05 04:16:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.5185031185031184) internal successors, (16924), 4810 states have internal predecessors, (16924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16924 transitions. [2021-06-05 04:16:28,257 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16924 transitions. Word has length 22 [2021-06-05 04:16:28,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:28,257 INFO L482 AbstractCegarLoop]: Abstraction has 4811 states and 16924 transitions. [2021-06-05 04:16:28,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:28,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16924 transitions. [2021-06-05 04:16:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:28,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:28,261 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:28,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21478 [2021-06-05 04:16:28,477 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1749302628, now seen corresponding path program 113 times [2021-06-05 04:16:28,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:28,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035283282] [2021-06-05 04:16:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:28,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:28,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035283282] [2021-06-05 04:16:28,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035283282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:28,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20712339] [2021-06-05 04:16:28,529 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 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 04:16:28,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:16:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:28,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:28,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:28,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20712339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:28,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:28,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:28,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227860080] [2021-06-05 04:16:28,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:28,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:28,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:28,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:28,607 INFO L87 Difference]: Start difference. First operand 4811 states and 16924 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:28,727 INFO L93 Difference]: Finished difference Result 5260 states and 17706 transitions. [2021-06-05 04:16:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:16:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:28,735 INFO L225 Difference]: With dead ends: 5260 [2021-06-05 04:16:28,736 INFO L226 Difference]: Without dead ends: 5260 [2021-06-05 04:16:28,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:28,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2021-06-05 04:16:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 4668. [2021-06-05 04:16:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 3.503106920934219) internal successors, (16349), 4667 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 16349 transitions. [2021-06-05 04:16:28,814 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 16349 transitions. Word has length 22 [2021-06-05 04:16:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:28,814 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 16349 transitions. [2021-06-05 04:16:28,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 16349 transitions. [2021-06-05 04:16:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:28,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:28,818 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:29,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21479,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:29,029 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1460982237, now seen corresponding path program 114 times [2021-06-05 04:16:29,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:29,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609705548] [2021-06-05 04:16:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:29,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609705548] [2021-06-05 04:16:29,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609705548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274363525] [2021-06-05 04:16:29,092 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 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 04:16:29,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:16:29,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:29,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:29,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:29,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274363525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:29,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:29,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:29,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698451901] [2021-06-05 04:16:29,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:29,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:29,157 INFO L87 Difference]: Start difference. First operand 4668 states and 16349 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:29,311 INFO L93 Difference]: Finished difference Result 4999 states and 17165 transitions. [2021-06-05 04:16:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:29,317 INFO L225 Difference]: With dead ends: 4999 [2021-06-05 04:16:29,317 INFO L226 Difference]: Without dead ends: 4996 [2021-06-05 04:16:29,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-06-05 04:16:29,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4674. [2021-06-05 04:16:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 3.503316927027605) internal successors, (16371), 4673 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 16371 transitions. [2021-06-05 04:16:29,377 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 16371 transitions. Word has length 22 [2021-06-05 04:16:29,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:29,377 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 16371 transitions. [2021-06-05 04:16:29,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 16371 transitions. [2021-06-05 04:16:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:29,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:29,380 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:29,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21480 [2021-06-05 04:16:29,580 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:29,580 INFO L82 PathProgramCache]: Analyzing trace with hash -311557174, now seen corresponding path program 115 times [2021-06-05 04:16:29,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:29,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933782822] [2021-06-05 04:16:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:29,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:29,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933782822] [2021-06-05 04:16:29,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933782822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:29,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404711891] [2021-06-05 04:16:29,637 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 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 04:16:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:29,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:29,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:29,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404711891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:29,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:29,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:29,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488849804] [2021-06-05 04:16:29,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:29,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:29,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:29,702 INFO L87 Difference]: Start difference. First operand 4674 states and 16371 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:29,808 INFO L93 Difference]: Finished difference Result 8484 states and 29708 transitions. [2021-06-05 04:16:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:16:29,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:29,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:29,821 INFO L225 Difference]: With dead ends: 8484 [2021-06-05 04:16:29,821 INFO L226 Difference]: Without dead ends: 8484 [2021-06-05 04:16:29,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:16:29,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-06-05 04:16:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 7934. [2021-06-05 04:16:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.6155300642884156) internal successors, (28682), 7933 states have internal predecessors, (28682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28682 transitions. [2021-06-05 04:16:29,944 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28682 transitions. Word has length 22 [2021-06-05 04:16:29,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:29,944 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28682 transitions. [2021-06-05 04:16:29,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28682 transitions. [2021-06-05 04:16:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:29,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:29,948 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:30,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21481,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:30,164 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:30,164 INFO L82 PathProgramCache]: Analyzing trace with hash 387896857, now seen corresponding path program 116 times [2021-06-05 04:16:30,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:30,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371364417] [2021-06-05 04:16:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:30,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:30,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371364417] [2021-06-05 04:16:30,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371364417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:30,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832774165] [2021-06-05 04:16:30,227 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 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 04:16:30,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:30,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:30,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:30,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:30,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832774165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:30,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:30,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:30,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615493405] [2021-06-05 04:16:30,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:30,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:30,298 INFO L87 Difference]: Start difference. First operand 7934 states and 28682 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:30,472 INFO L93 Difference]: Finished difference Result 8250 states and 29464 transitions. [2021-06-05 04:16:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:16:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:30,483 INFO L225 Difference]: With dead ends: 8250 [2021-06-05 04:16:30,483 INFO L226 Difference]: Without dead ends: 8246 [2021-06-05 04:16:30,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2021-06-05 04:16:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7934. [2021-06-05 04:16:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.615277952855162) internal successors, (28680), 7933 states have internal predecessors, (28680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28680 transitions. [2021-06-05 04:16:30,598 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28680 transitions. Word has length 22 [2021-06-05 04:16:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:30,598 INFO L482 AbstractCegarLoop]: Abstraction has 7934 states and 28680 transitions. [2021-06-05 04:16:30,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28680 transitions. [2021-06-05 04:16:30,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:30,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:30,602 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:30,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21482,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:30,803 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:30,803 INFO L82 PathProgramCache]: Analyzing trace with hash 226298404, now seen corresponding path program 117 times [2021-06-05 04:16:30,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:30,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897368846] [2021-06-05 04:16:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:30,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:30,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897368846] [2021-06-05 04:16:30,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897368846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:30,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597719954] [2021-06-05 04:16:30,863 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 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 04:16:30,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:16:30,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:30,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:30,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:30,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597719954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:30,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:30,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:30,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920696603] [2021-06-05 04:16:30,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:30,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:30,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:30,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:30,932 INFO L87 Difference]: Start difference. First operand 7934 states and 28680 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:31,081 INFO L93 Difference]: Finished difference Result 11106 states and 39649 transitions. [2021-06-05 04:16:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:16:31,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:31,099 INFO L225 Difference]: With dead ends: 11106 [2021-06-05 04:16:31,099 INFO L226 Difference]: Without dead ends: 11106 [2021-06-05 04:16:31,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-06-05 04:16:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10570. [2021-06-05 04:16:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.65701580092724) internal successors, (38651), 10569 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 38651 transitions. [2021-06-05 04:16:31,272 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 38651 transitions. Word has length 22 [2021-06-05 04:16:31,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:31,272 INFO L482 AbstractCegarLoop]: Abstraction has 10570 states and 38651 transitions. [2021-06-05 04:16:31,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 38651 transitions. [2021-06-05 04:16:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:31,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:31,277 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:31,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21483 [2021-06-05 04:16:31,478 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:31,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:31,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1481988445, now seen corresponding path program 118 times [2021-06-05 04:16:31,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:31,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306569190] [2021-06-05 04:16:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:31,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:31,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306569190] [2021-06-05 04:16:31,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306569190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:31,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80924143] [2021-06-05 04:16:31,545 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 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 04:16:31,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:31,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:31,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:31,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80924143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:31,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:31,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:31,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943121570] [2021-06-05 04:16:31,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:31,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:31,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:31,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:31,607 INFO L87 Difference]: Start difference. First operand 10570 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:31,792 INFO L93 Difference]: Finished difference Result 10860 states and 39397 transitions. [2021-06-05 04:16:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:16:31,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:31,808 INFO L225 Difference]: With dead ends: 10860 [2021-06-05 04:16:31,808 INFO L226 Difference]: Without dead ends: 10855 [2021-06-05 04:16:31,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-06-05 04:16:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10571. [2021-06-05 04:16:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.656669820245979) internal successors, (38651), 10570 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 38651 transitions. [2021-06-05 04:16:32,007 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 38651 transitions. Word has length 22 [2021-06-05 04:16:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:32,007 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 38651 transitions. [2021-06-05 04:16:32,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 38651 transitions. [2021-06-05 04:16:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:32,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:32,012 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:32,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21484 [2021-06-05 04:16:32,212 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:32,213 INFO L82 PathProgramCache]: Analyzing trace with hash -280047862, now seen corresponding path program 119 times [2021-06-05 04:16:32,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:32,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844822853] [2021-06-05 04:16:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:32,280 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:32,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:32,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844822853] [2021-06-05 04:16:32,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844822853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:32,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538905796] [2021-06-05 04:16:32,280 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 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 04:16:32,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:16:32,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:32,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:32,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538905796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:32,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:32,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:32,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476633048] [2021-06-05 04:16:32,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:32,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:32,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:32,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:32,347 INFO L87 Difference]: Start difference. First operand 10571 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:32,556 INFO L93 Difference]: Finished difference Result 13741 states and 49418 transitions. [2021-06-05 04:16:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:32,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:32,580 INFO L225 Difference]: With dead ends: 13741 [2021-06-05 04:16:32,580 INFO L226 Difference]: Without dead ends: 13741 [2021-06-05 04:16:32,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:16:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2021-06-05 04:16:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 12995. [2021-06-05 04:16:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 3.6815453286132063) internal successors, (47838), 12994 states have internal predecessors, (47838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 47838 transitions. [2021-06-05 04:16:32,814 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 47838 transitions. Word has length 22 [2021-06-05 04:16:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:32,814 INFO L482 AbstractCegarLoop]: Abstraction has 12995 states and 47838 transitions. [2021-06-05 04:16:32,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 47838 transitions. [2021-06-05 04:16:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:32,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:32,819 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:33,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21485,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:33,020 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:33,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1088085113, now seen corresponding path program 120 times [2021-06-05 04:16:33,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:33,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447869576] [2021-06-05 04:16:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:33,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:33,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447869576] [2021-06-05 04:16:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447869576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:33,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790438452] [2021-06-05 04:16:33,079 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 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 04:16:33,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:16:33,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:33,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:33,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790438452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:33,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:33,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:33,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224846793] [2021-06-05 04:16:33,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:33,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:33,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:33,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:33,142 INFO L87 Difference]: Start difference. First operand 12995 states and 47838 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:33,263 INFO L93 Difference]: Finished difference Result 13222 states and 47729 transitions. [2021-06-05 04:16:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:16:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:33,287 INFO L225 Difference]: With dead ends: 13222 [2021-06-05 04:16:33,288 INFO L226 Difference]: Without dead ends: 13222 [2021-06-05 04:16:33,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:16:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-06-05 04:16:33,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 12777. [2021-06-05 04:16:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12777 states, 12776 states have (on average 3.6486380713838447) internal successors, (46615), 12776 states have internal predecessors, (46615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12777 states to 12777 states and 46615 transitions. [2021-06-05 04:16:33,502 INFO L78 Accepts]: Start accepts. Automaton has 12777 states and 46615 transitions. Word has length 22 [2021-06-05 04:16:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:33,502 INFO L482 AbstractCegarLoop]: Abstraction has 12777 states and 46615 transitions. [2021-06-05 04:16:33,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 12777 states and 46615 transitions. [2021-06-05 04:16:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:33,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:33,507 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:33,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21486 [2021-06-05 04:16:33,708 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:33,708 INFO L82 PathProgramCache]: Analyzing trace with hash -4794980, now seen corresponding path program 121 times [2021-06-05 04:16:33,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:33,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684230332] [2021-06-05 04:16:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:33,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:33,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684230332] [2021-06-05 04:16:33,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684230332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:33,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071352772] [2021-06-05 04:16:33,763 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 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 04:16:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:33,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:33,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071352772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:33,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:33,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:33,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291584510] [2021-06-05 04:16:33,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:33,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:33,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:33,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:33,818 INFO L87 Difference]: Start difference. First operand 12777 states and 46615 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:34,009 INFO L93 Difference]: Finished difference Result 13713 states and 49513 transitions. [2021-06-05 04:16:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:34,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:34,039 INFO L225 Difference]: With dead ends: 13713 [2021-06-05 04:16:34,039 INFO L226 Difference]: Without dead ends: 13711 [2021-06-05 04:16:34,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2021-06-05 04:16:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 13456. [2021-06-05 04:16:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13456 states, 13455 states have (on average 3.6375325157933855) internal successors, (48943), 13455 states have internal predecessors, (48943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13456 states to 13456 states and 48943 transitions. [2021-06-05 04:16:34,275 INFO L78 Accepts]: Start accepts. Automaton has 13456 states and 48943 transitions. Word has length 22 [2021-06-05 04:16:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:34,275 INFO L482 AbstractCegarLoop]: Abstraction has 13456 states and 48943 transitions. [2021-06-05 04:16:34,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 13456 states and 48943 transitions. [2021-06-05 04:16:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:34,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:34,281 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:34,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21487,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:34,481 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash 652007197, now seen corresponding path program 122 times [2021-06-05 04:16:34,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:34,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389380217] [2021-06-05 04:16:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:34,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:34,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389380217] [2021-06-05 04:16:34,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389380217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:34,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425205565] [2021-06-05 04:16:34,540 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 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 04:16:34,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:34,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:34,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:34,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425205565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:34,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:34,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:34,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87688416] [2021-06-05 04:16:34,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:34,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:34,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:34,595 INFO L87 Difference]: Start difference. First operand 13456 states and 48943 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:34,781 INFO L93 Difference]: Finished difference Result 13655 states and 49230 transitions. [2021-06-05 04:16:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:34,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:34,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:34,807 INFO L225 Difference]: With dead ends: 13655 [2021-06-05 04:16:34,807 INFO L226 Difference]: Without dead ends: 13653 [2021-06-05 04:16:34,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2021-06-05 04:16:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 13436. [2021-06-05 04:16:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 13435 states have (on average 3.621734276144399) internal successors, (48658), 13435 states have internal predecessors, (48658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 48658 transitions. [2021-06-05 04:16:35,091 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 48658 transitions. Word has length 22 [2021-06-05 04:16:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:35,092 INFO L482 AbstractCegarLoop]: Abstraction has 13436 states and 48658 transitions. [2021-06-05 04:16:35,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 48658 transitions. [2021-06-05 04:16:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:35,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:35,097 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:35,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21488 [2021-06-05 04:16:35,298 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1574425930, now seen corresponding path program 123 times [2021-06-05 04:16:35,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:35,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249995794] [2021-06-05 04:16:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:35,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:35,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249995794] [2021-06-05 04:16:35,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249995794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:35,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606077761] [2021-06-05 04:16:35,355 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 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 04:16:35,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:16:35,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:35,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606077761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:35,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:35,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:35,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088172502] [2021-06-05 04:16:35,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:35,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:35,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:35,425 INFO L87 Difference]: Start difference. First operand 13436 states and 48658 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:35,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:35,521 INFO L93 Difference]: Finished difference Result 13677 states and 48611 transitions. [2021-06-05 04:16:35,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:16:35,521 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:16:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:35,545 INFO L225 Difference]: With dead ends: 13677 [2021-06-05 04:16:35,545 INFO L226 Difference]: Without dead ends: 13677 [2021-06-05 04:16:35,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-06-05 04:16:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13135. [2021-06-05 04:16:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607887924470839) internal successors, (47386), 13134 states have internal predecessors, (47386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47386 transitions. [2021-06-05 04:16:35,791 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47386 transitions. Word has length 22 [2021-06-05 04:16:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:35,791 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47386 transitions. [2021-06-05 04:16:35,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:16:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47386 transitions. [2021-06-05 04:16:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:35,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:35,797 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:35,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21489 [2021-06-05 04:16:35,999 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:35,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1932346791, now seen corresponding path program 124 times [2021-06-05 04:16:35,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:35,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133682213] [2021-06-05 04:16:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:36,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:36,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133682213] [2021-06-05 04:16:36,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133682213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:36,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223104981] [2021-06-05 04:16:36,064 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 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 04:16:36,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:36,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:36,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:36,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:36,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223104981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:36,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:36,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:36,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446371304] [2021-06-05 04:16:36,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:36,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:36,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:36,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:36,123 INFO L87 Difference]: Start difference. First operand 13135 states and 47386 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:36,326 INFO L93 Difference]: Finished difference Result 13337 states and 47678 transitions. [2021-06-05 04:16:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:16:36,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:36,352 INFO L225 Difference]: With dead ends: 13337 [2021-06-05 04:16:36,352 INFO L226 Difference]: Without dead ends: 13335 [2021-06-05 04:16:36,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=271, Invalid=485, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2021-06-05 04:16:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 13135. [2021-06-05 04:16:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607202680067002) internal successors, (47377), 13134 states have internal predecessors, (47377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47377 transitions. [2021-06-05 04:16:36,581 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47377 transitions. Word has length 22 [2021-06-05 04:16:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:36,581 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47377 transitions. [2021-06-05 04:16:36,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47377 transitions. [2021-06-05 04:16:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:36,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:36,587 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:36,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21490,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:36,789 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash -154621404, now seen corresponding path program 125 times [2021-06-05 04:16:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:36,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109192383] [2021-06-05 04:16:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:36,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:36,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109192383] [2021-06-05 04:16:36,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109192383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:36,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871670814] [2021-06-05 04:16:36,850 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 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 04:16:36,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:16:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:36,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871670814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:36,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:36,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:36,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563805263] [2021-06-05 04:16:36,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:36,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:36,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:36,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:36,914 INFO L87 Difference]: Start difference. First operand 13135 states and 47377 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:37,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:37,048 INFO L93 Difference]: Finished difference Result 14025 states and 49447 transitions. [2021-06-05 04:16:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:37,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:37,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:37,076 INFO L225 Difference]: With dead ends: 14025 [2021-06-05 04:16:37,076 INFO L226 Difference]: Without dead ends: 14025 [2021-06-05 04:16:37,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:37,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-06-05 04:16:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 12987. [2021-06-05 04:16:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12987 states, 12986 states have (on average 3.587170799322347) internal successors, (46583), 12986 states have internal predecessors, (46583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12987 states to 12987 states and 46583 transitions. [2021-06-05 04:16:37,325 INFO L78 Accepts]: Start accepts. Automaton has 12987 states and 46583 transitions. Word has length 22 [2021-06-05 04:16:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:37,325 INFO L482 AbstractCegarLoop]: Abstraction has 12987 states and 46583 transitions. [2021-06-05 04:16:37,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 12987 states and 46583 transitions. [2021-06-05 04:16:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:37,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:37,330 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:37,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21491,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:37,531 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:37,531 INFO L82 PathProgramCache]: Analyzing trace with hash -442941795, now seen corresponding path program 126 times [2021-06-05 04:16:37,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:37,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722995932] [2021-06-05 04:16:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:37,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:37,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722995932] [2021-06-05 04:16:37,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722995932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:37,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928405766] [2021-06-05 04:16:37,596 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 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 04:16:37,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:16:37,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:37,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928405766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:37,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:37,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:37,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117814608] [2021-06-05 04:16:37,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:37,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:37,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:37,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:37,657 INFO L87 Difference]: Start difference. First operand 12987 states and 46583 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:37,850 INFO L93 Difference]: Finished difference Result 13344 states and 47452 transitions. [2021-06-05 04:16:37,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:37,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:37,874 INFO L225 Difference]: With dead ends: 13344 [2021-06-05 04:16:37,874 INFO L226 Difference]: Without dead ends: 13341 [2021-06-05 04:16:37,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-06-05 04:16:38,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 12991. [2021-06-05 04:16:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.5871439568899155) internal successors, (46597), 12990 states have internal predecessors, (46597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 46597 transitions. [2021-06-05 04:16:38,119 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 46597 transitions. Word has length 22 [2021-06-05 04:16:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:38,119 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 46597 transitions. [2021-06-05 04:16:38,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 46597 transitions. [2021-06-05 04:16:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:38,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:38,125 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:38,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21492 [2021-06-05 04:16:38,325 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:38,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:38,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2079486090, now seen corresponding path program 127 times [2021-06-05 04:16:38,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:38,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26158167] [2021-06-05 04:16:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:38,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:38,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26158167] [2021-06-05 04:16:38,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26158167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:38,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849240770] [2021-06-05 04:16:38,387 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 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 04:16:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:38,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:38,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849240770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:38,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:38,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:38,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583148493] [2021-06-05 04:16:38,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:38,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:38,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:38,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:38,452 INFO L87 Difference]: Start difference. First operand 12991 states and 46597 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:38,605 INFO L93 Difference]: Finished difference Result 23387 states and 84578 transitions. [2021-06-05 04:16:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:38,650 INFO L225 Difference]: With dead ends: 23387 [2021-06-05 04:16:38,650 INFO L226 Difference]: Without dead ends: 23387 [2021-06-05 04:16:38,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:16:38,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23387 states. [2021-06-05 04:16:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23387 to 22894. [2021-06-05 04:16:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538679945834973) internal successors, (83648), 22893 states have internal predecessors, (83648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83648 transitions. [2021-06-05 04:16:39,080 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83648 transitions. Word has length 22 [2021-06-05 04:16:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:39,080 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83648 transitions. [2021-06-05 04:16:39,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83648 transitions. [2021-06-05 04:16:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:39,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:39,085 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:39,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21493 [2021-06-05 04:16:39,286 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1516027175, now seen corresponding path program 128 times [2021-06-05 04:16:39,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:39,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906421712] [2021-06-05 04:16:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:39,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:39,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906421712] [2021-06-05 04:16:39,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906421712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:39,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099338174] [2021-06-05 04:16:39,359 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 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 04:16:39,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:39,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:39,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:39,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099338174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:39,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:39,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:39,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553460033] [2021-06-05 04:16:39,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:39,430 INFO L87 Difference]: Start difference. First operand 22894 states and 83648 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:39,649 INFO L93 Difference]: Finished difference Result 23234 states and 84479 transitions. [2021-06-05 04:16:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:16:39,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:39,693 INFO L225 Difference]: With dead ends: 23234 [2021-06-05 04:16:39,694 INFO L226 Difference]: Without dead ends: 23230 [2021-06-05 04:16:39,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-06-05 04:16:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 22894. [2021-06-05 04:16:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538243131088106) internal successors, (83647), 22893 states have internal predecessors, (83647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83647 transitions. [2021-06-05 04:16:40,095 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83647 transitions. Word has length 22 [2021-06-05 04:16:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:40,095 INFO L482 AbstractCegarLoop]: Abstraction has 22894 states and 83647 transitions. [2021-06-05 04:16:40,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83647 transitions. [2021-06-05 04:16:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:40,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:40,100 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:40,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21494,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:40,301 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1677625628, now seen corresponding path program 129 times [2021-06-05 04:16:40,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:40,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554073295] [2021-06-05 04:16:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:40,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:40,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554073295] [2021-06-05 04:16:40,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554073295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:40,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901132932] [2021-06-05 04:16:40,361 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 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 04:16:40,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:16:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:40,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901132932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:40,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:40,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:40,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916787726] [2021-06-05 04:16:40,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:40,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:40,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:40,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:40,424 INFO L87 Difference]: Start difference. First operand 22894 states and 83647 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:40,687 INFO L93 Difference]: Finished difference Result 28918 states and 105542 transitions. [2021-06-05 04:16:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:40,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:40,740 INFO L225 Difference]: With dead ends: 28918 [2021-06-05 04:16:40,740 INFO L226 Difference]: Without dead ends: 28918 [2021-06-05 04:16:40,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:16:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-06-05 04:16:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 28548. [2021-06-05 04:16:41,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676428346236032) internal successors, (104951), 28547 states have internal predecessors, (104951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104951 transitions. [2021-06-05 04:16:41,249 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104951 transitions. Word has length 22 [2021-06-05 04:16:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:41,249 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104951 transitions. [2021-06-05 04:16:41,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104951 transitions. [2021-06-05 04:16:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:41,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:41,254 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:41,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21495,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:41,455 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:41,455 INFO L82 PathProgramCache]: Analyzing trace with hash -421935587, now seen corresponding path program 130 times [2021-06-05 04:16:41,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:41,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150469571] [2021-06-05 04:16:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:41,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150469571] [2021-06-05 04:16:41,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150469571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423310391] [2021-06-05 04:16:41,524 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 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 04:16:41,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:41,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:41,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:41,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423310391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:41,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:41,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:41,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584268909] [2021-06-05 04:16:41,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:41,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:41,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:41,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:41,581 INFO L87 Difference]: Start difference. First operand 28548 states and 104951 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:41,829 INFO L93 Difference]: Finished difference Result 28872 states and 105754 transitions. [2021-06-05 04:16:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:16:41,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:41,892 INFO L225 Difference]: With dead ends: 28872 [2021-06-05 04:16:41,892 INFO L226 Difference]: Without dead ends: 28867 [2021-06-05 04:16:41,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:41,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-06-05 04:16:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28548. [2021-06-05 04:16:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676393316285424) internal successors, (104950), 28547 states have internal predecessors, (104950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104950 transitions. [2021-06-05 04:16:42,419 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104950 transitions. Word has length 22 [2021-06-05 04:16:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:42,420 INFO L482 AbstractCegarLoop]: Abstraction has 28548 states and 104950 transitions. [2021-06-05 04:16:42,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104950 transitions. [2021-06-05 04:16:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:42,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:42,425 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:42,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21496 [2021-06-05 04:16:42,626 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2110995402, now seen corresponding path program 131 times [2021-06-05 04:16:42,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:42,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517245630] [2021-06-05 04:16:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:42,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:42,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517245630] [2021-06-05 04:16:42,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517245630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:42,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890395127] [2021-06-05 04:16:42,692 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 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 04:16:42,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:16:42,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:42,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:42,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:42,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890395127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:42,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:42,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:42,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345198036] [2021-06-05 04:16:42,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:42,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:42,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:42,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:42,754 INFO L87 Difference]: Start difference. First operand 28548 states and 104950 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:43,106 INFO L93 Difference]: Finished difference Result 31093 states and 113517 transitions. [2021-06-05 04:16:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:16:43,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:43,183 INFO L225 Difference]: With dead ends: 31093 [2021-06-05 04:16:43,183 INFO L226 Difference]: Without dead ends: 31093 [2021-06-05 04:16:43,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:16:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31093 states. [2021-06-05 04:16:43,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31093 to 30705. [2021-06-05 04:16:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30705 states, 30704 states have (on average 3.6772081813444504) internal successors, (112905), 30704 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:43,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30705 states to 30705 states and 112905 transitions. [2021-06-05 04:16:43,899 INFO L78 Accepts]: Start accepts. Automaton has 30705 states and 112905 transitions. Word has length 22 [2021-06-05 04:16:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:43,899 INFO L482 AbstractCegarLoop]: Abstraction has 30705 states and 112905 transitions. [2021-06-05 04:16:43,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 30705 states and 112905 transitions. [2021-06-05 04:16:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:43,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:43,905 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:44,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21497 [2021-06-05 04:16:44,106 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:44,106 INFO L82 PathProgramCache]: Analyzing trace with hash -864834727, now seen corresponding path program 132 times [2021-06-05 04:16:44,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:44,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400005235] [2021-06-05 04:16:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:44,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:44,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400005235] [2021-06-05 04:16:44,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400005235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:44,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262476768] [2021-06-05 04:16:44,184 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 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 04:16:44,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:16:44,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:44,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:44,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262476768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:44,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:44,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:44,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884085148] [2021-06-05 04:16:44,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:44,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:44,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:44,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:44,245 INFO L87 Difference]: Start difference. First operand 30705 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:44,529 INFO L93 Difference]: Finished difference Result 31001 states and 113666 transitions. [2021-06-05 04:16:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:16:44,532 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:44,598 INFO L225 Difference]: With dead ends: 31001 [2021-06-05 04:16:44,599 INFO L226 Difference]: Without dead ends: 30995 [2021-06-05 04:16:44,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30995 states. [2021-06-05 04:16:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30995 to 30706. [2021-06-05 04:16:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30706 states, 30705 states have (on average 3.6770884220810944) internal successors, (112905), 30705 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30706 states to 30706 states and 112905 transitions. [2021-06-05 04:16:45,189 INFO L78 Accepts]: Start accepts. Automaton has 30706 states and 112905 transitions. Word has length 22 [2021-06-05 04:16:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:45,189 INFO L482 AbstractCegarLoop]: Abstraction has 30706 states and 112905 transitions. [2021-06-05 04:16:45,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 30706 states and 112905 transitions. [2021-06-05 04:16:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:45,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:45,195 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:45,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21498 [2021-06-05 04:16:45,395 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:45,396 INFO L82 PathProgramCache]: Analyzing trace with hash -700836956, now seen corresponding path program 133 times [2021-06-05 04:16:45,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:45,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450389293] [2021-06-05 04:16:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:45,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:45,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450389293] [2021-06-05 04:16:45,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450389293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:45,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487163904] [2021-06-05 04:16:45,465 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 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 04:16:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:45,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:45,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487163904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:45,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:45,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:16:45,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940424606] [2021-06-05 04:16:45,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:45,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:45,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:45,525 INFO L87 Difference]: Start difference. First operand 30706 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:45,875 INFO L93 Difference]: Finished difference Result 32605 states and 118879 transitions. [2021-06-05 04:16:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:16:45,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:16:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:45,945 INFO L225 Difference]: With dead ends: 32605 [2021-06-05 04:16:45,946 INFO L226 Difference]: Without dead ends: 32605 [2021-06-05 04:16:45,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:16:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32605 states. [2021-06-05 04:16:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32605 to 32065. [2021-06-05 04:16:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32065 states, 32064 states have (on average 3.6761477045908184) internal successors, (117872), 32064 states have internal predecessors, (117872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 117872 transitions. [2021-06-05 04:16:46,607 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 117872 transitions. Word has length 22 [2021-06-05 04:16:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:46,607 INFO L482 AbstractCegarLoop]: Abstraction has 32065 states and 117872 transitions. [2021-06-05 04:16:46,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:16:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 117872 transitions. [2021-06-05 04:16:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:46,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:46,613 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:46,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21499 [2021-06-05 04:16:46,814 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:46,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:46,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1675189249, now seen corresponding path program 134 times [2021-06-05 04:16:46,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:46,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672706647] [2021-06-05 04:16:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:16:46,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:46,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672706647] [2021-06-05 04:16:46,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672706647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:46,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360557456] [2021-06-05 04:16:46,859 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 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 04:16:46,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:46,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:46,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:16:46,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360557456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:46,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:46,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:16:46,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941688477] [2021-06-05 04:16:46,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:16:46,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:46,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:16:46,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:16:46,920 INFO L87 Difference]: Start difference. First operand 32065 states and 117872 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:16:47,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:47,127 INFO L93 Difference]: Finished difference Result 32258 states and 118308 transitions. [2021-06-05 04:16:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:16:47,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 22 [2021-06-05 04:16:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:47,196 INFO L225 Difference]: With dead ends: 32258 [2021-06-05 04:16:47,196 INFO L226 Difference]: Without dead ends: 32258 [2021-06-05 04:16:47,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32258 states. [2021-06-05 04:16:47,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32258 to 32110. [2021-06-05 04:16:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32110 states, 32109 states have (on average 3.6754492509888195) internal successors, (118015), 32109 states have internal predecessors, (118015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32110 states to 32110 states and 118015 transitions. [2021-06-05 04:16:47,805 INFO L78 Accepts]: Start accepts. Automaton has 32110 states and 118015 transitions. Word has length 22 [2021-06-05 04:16:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:47,805 INFO L482 AbstractCegarLoop]: Abstraction has 32110 states and 118015 transitions. [2021-06-05 04:16:47,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:16:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 32110 states and 118015 transitions. [2021-06-05 04:16:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:47,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:47,811 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:48,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21500 [2021-06-05 04:16:48,012 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1842033802, now seen corresponding path program 135 times [2021-06-05 04:16:48,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:48,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92631841] [2021-06-05 04:16:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:16:48,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:48,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92631841] [2021-06-05 04:16:48,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92631841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:48,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091638750] [2021-06-05 04:16:48,057 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 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 04:16:48,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:16:48,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:48,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:16:48,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091638750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:48,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:48,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:16:48,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907238162] [2021-06-05 04:16:48,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:16:48,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:48,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:16:48,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:16:48,116 INFO L87 Difference]: Start difference. First operand 32110 states and 118015 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:16:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:48,385 INFO L93 Difference]: Finished difference Result 36772 states and 134931 transitions. [2021-06-05 04:16:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:16:48,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 22 [2021-06-05 04:16:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:48,474 INFO L225 Difference]: With dead ends: 36772 [2021-06-05 04:16:48,474 INFO L226 Difference]: Without dead ends: 36768 [2021-06-05 04:16:48,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36768 states. [2021-06-05 04:16:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36768 to 36566. [2021-06-05 04:16:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.6828114316969778) internal successors, (134662), 36565 states have internal predecessors, (134662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134662 transitions. [2021-06-05 04:16:49,306 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134662 transitions. Word has length 22 [2021-06-05 04:16:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:49,306 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134662 transitions. [2021-06-05 04:16:49,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 04:16:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134662 transitions. [2021-06-05 04:16:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:49,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:49,313 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:49,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21501 [2021-06-05 04:16:49,521 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1592090717, now seen corresponding path program 136 times [2021-06-05 04:16:49,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:49,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308779825] [2021-06-05 04:16:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:16:49,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:49,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308779825] [2021-06-05 04:16:49,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308779825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:49,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046130414] [2021-06-05 04:16:49,572 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 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 04:16:49,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:49,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:49,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:16:49,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046130414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:49,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:49,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:16:49,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166621445] [2021-06-05 04:16:49,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:49,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:49,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:49,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:49,628 INFO L87 Difference]: Start difference. First operand 36566 states and 134662 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:16:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:49,869 INFO L93 Difference]: Finished difference Result 36756 states and 135097 transitions. [2021-06-05 04:16:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:16:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 22 [2021-06-05 04:16:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:49,948 INFO L225 Difference]: With dead ends: 36756 [2021-06-05 04:16:49,948 INFO L226 Difference]: Without dead ends: 36753 [2021-06-05 04:16:49,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:16:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36753 states. [2021-06-05 04:16:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36753 to 36566. [2021-06-05 04:16:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.682756734582251) internal successors, (134660), 36565 states have internal predecessors, (134660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134660 transitions. [2021-06-05 04:16:50,697 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134660 transitions. Word has length 22 [2021-06-05 04:16:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:50,697 INFO L482 AbstractCegarLoop]: Abstraction has 36566 states and 134660 transitions. [2021-06-05 04:16:50,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:16:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134660 transitions. [2021-06-05 04:16:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:50,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:50,704 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:50,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21502 [2021-06-05 04:16:50,905 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:50,905 INFO L82 PathProgramCache]: Analyzing trace with hash -180448694, now seen corresponding path program 137 times [2021-06-05 04:16:50,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:50,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295404240] [2021-06-05 04:16:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:16:50,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:50,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295404240] [2021-06-05 04:16:50,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295404240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:50,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115870894] [2021-06-05 04:16:50,950 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 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 04:16:50,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:16:50,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:16:51,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115870894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:51,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:51,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:16:51,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365513886] [2021-06-05 04:16:51,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:16:51,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:51,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:16:51,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:16:51,018 INFO L87 Difference]: Start difference. First operand 36566 states and 134660 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:16:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:51,380 INFO L93 Difference]: Finished difference Result 38596 states and 141165 transitions. [2021-06-05 04:16:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:51,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 22 [2021-06-05 04:16:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:51,459 INFO L225 Difference]: With dead ends: 38596 [2021-06-05 04:16:51,459 INFO L226 Difference]: Without dead ends: 38596 [2021-06-05 04:16:51,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38596 states. [2021-06-05 04:16:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38596 to 38072. [2021-06-05 04:16:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6814373144913453) internal successors, (140156), 38071 states have internal predecessors, (140156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140156 transitions. [2021-06-05 04:16:52,131 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140156 transitions. Word has length 22 [2021-06-05 04:16:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:52,131 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140156 transitions. [2021-06-05 04:16:52,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:16:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140156 transitions. [2021-06-05 04:16:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:52,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:52,138 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:52,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21503,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:52,339 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:52,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1085744451, now seen corresponding path program 138 times [2021-06-05 04:16:52,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:52,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793764944] [2021-06-05 04:16:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:52,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:52,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793764944] [2021-06-05 04:16:52,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793764944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:52,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359119977] [2021-06-05 04:16:52,394 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 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 04:16:52,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:16:52,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:52,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:52,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:16:52,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359119977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:52,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:52,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:16:52,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629737239] [2021-06-05 04:16:52,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:52,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:52,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:52,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:52,453 INFO L87 Difference]: Start difference. First operand 38072 states and 140156 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:16:52,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:52,704 INFO L93 Difference]: Finished difference Result 38447 states and 141068 transitions. [2021-06-05 04:16:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:16:52,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-05 04:16:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:52,792 INFO L225 Difference]: With dead ends: 38447 [2021-06-05 04:16:52,793 INFO L226 Difference]: Without dead ends: 38444 [2021-06-05 04:16:52,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38444 states. [2021-06-05 04:16:53,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38444 to 38072. [2021-06-05 04:16:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6813322476425627) internal successors, (140152), 38071 states have internal predecessors, (140152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140152 transitions. [2021-06-05 04:16:53,539 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140152 transitions. Word has length 22 [2021-06-05 04:16:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:53,539 INFO L482 AbstractCegarLoop]: Abstraction has 38072 states and 140152 transitions. [2021-06-05 04:16:53,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:16:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140152 transitions. [2021-06-05 04:16:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:53,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:53,546 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:53,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21504,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:53,746 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:53,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash -686794960, now seen corresponding path program 139 times [2021-06-05 04:16:53,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:53,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75225729] [2021-06-05 04:16:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:54,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:54,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75225729] [2021-06-05 04:16:54,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75225729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:54,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934401584] [2021-06-05 04:16:54,030 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 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 04:16:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:54,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:16:54,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934401584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:54,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:54,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:16:54,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280042751] [2021-06-05 04:16:54,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:54,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:54,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:54,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:54,231 INFO L87 Difference]: Start difference. First operand 38072 states and 140152 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:16:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:54,632 INFO L93 Difference]: Finished difference Result 47743 states and 174806 transitions. [2021-06-05 04:16:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:16:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-05 04:16:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:54,747 INFO L225 Difference]: With dead ends: 47743 [2021-06-05 04:16:54,748 INFO L226 Difference]: Without dead ends: 47743 [2021-06-05 04:16:54,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:16:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47743 states. [2021-06-05 04:16:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47743 to 46337. [2021-06-05 04:16:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46337 states, 46336 states have (on average 3.694190262430939) internal successors, (171174), 46336 states have internal predecessors, (171174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46337 states to 46337 states and 171174 transitions. [2021-06-05 04:16:55,862 INFO L78 Accepts]: Start accepts. Automaton has 46337 states and 171174 transitions. Word has length 22 [2021-06-05 04:16:55,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:55,862 INFO L482 AbstractCegarLoop]: Abstraction has 46337 states and 171174 transitions. [2021-06-05 04:16:55,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:16:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 46337 states and 171174 transitions. [2021-06-05 04:16:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:55,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:55,870 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:56,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21505,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:56,070 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:56,071 INFO L82 PathProgramCache]: Analyzing trace with hash 12659071, now seen corresponding path program 140 times [2021-06-05 04:16:56,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:56,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122868401] [2021-06-05 04:16:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:56,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:56,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122868401] [2021-06-05 04:16:56,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122868401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:56,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076431035] [2021-06-05 04:16:56,132 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 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 04:16:56,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:56,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:56,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:16:56,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076431035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:56,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:56,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:16:56,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268629641] [2021-06-05 04:16:56,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:56,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:56,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:56,193 INFO L87 Difference]: Start difference. First operand 46337 states and 171174 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:16:56,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:56,622 INFO L93 Difference]: Finished difference Result 46705 states and 172114 transitions. [2021-06-05 04:16:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:16:56,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-05 04:16:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:56,725 INFO L225 Difference]: With dead ends: 46705 [2021-06-05 04:16:56,725 INFO L226 Difference]: Without dead ends: 46701 [2021-06-05 04:16:56,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:16:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46701 states. [2021-06-05 04:16:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46701 to 46347. [2021-06-05 04:16:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46347 states, 46346 states have (on average 3.693911017132007) internal successors, (171198), 46346 states have internal predecessors, (171198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46347 states to 46347 states and 171198 transitions. [2021-06-05 04:16:57,850 INFO L78 Accepts]: Start accepts. Automaton has 46347 states and 171198 transitions. Word has length 22 [2021-06-05 04:16:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:57,850 INFO L482 AbstractCegarLoop]: Abstraction has 46347 states and 171198 transitions. [2021-06-05 04:16:57,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:16:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 46347 states and 171198 transitions. [2021-06-05 04:16:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:57,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:57,858 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:58,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21506,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:58,058 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:58,058 INFO L82 PathProgramCache]: Analyzing trace with hash -148939382, now seen corresponding path program 141 times [2021-06-05 04:16:58,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:58,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481138638] [2021-06-05 04:16:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:58,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:58,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481138638] [2021-06-05 04:16:58,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481138638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:58,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110821494] [2021-06-05 04:16:58,114 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 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 04:16:58,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:16:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:16:58,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:16:58,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110821494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:58,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:58,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:16:58,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026651457] [2021-06-05 04:16:58,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:58,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:58,192 INFO L87 Difference]: Start difference. First operand 46347 states and 171198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:16:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:58,714 INFO L93 Difference]: Finished difference Result 49378 states and 181574 transitions. [2021-06-05 04:16:58,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:16:58,714 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-05 04:16:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:58,834 INFO L225 Difference]: With dead ends: 49378 [2021-06-05 04:16:58,834 INFO L226 Difference]: Without dead ends: 49378 [2021-06-05 04:16:58,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:16:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49378 states. [2021-06-05 04:16:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49378 to 48899. [2021-06-05 04:16:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6954272158370487) internal successors, (180699), 48898 states have internal predecessors, (180699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180699 transitions. [2021-06-05 04:16:59,917 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180699 transitions. Word has length 22 [2021-06-05 04:16:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:59,917 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180699 transitions. [2021-06-05 04:16:59,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:16:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180699 transitions. [2021-06-05 04:16:59,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:16:59,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:59,923 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:00,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21507 [2021-06-05 04:17:00,125 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1726087907, now seen corresponding path program 142 times [2021-06-05 04:17:00,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:00,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327268074] [2021-06-05 04:17:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:00,181 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:00,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:00,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327268074] [2021-06-05 04:17:00,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327268074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:00,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938405274] [2021-06-05 04:17:00,181 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 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 04:17:00,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:00,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:00,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:00,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938405274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:00,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:00,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:00,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031016389] [2021-06-05 04:17:00,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:00,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:00,434 INFO L87 Difference]: Start difference. First operand 48899 states and 180699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:00,817 INFO L93 Difference]: Finished difference Result 49336 states and 181769 transitions. [2021-06-05 04:17:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:17:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:00,951 INFO L225 Difference]: With dead ends: 49336 [2021-06-05 04:17:00,951 INFO L226 Difference]: Without dead ends: 49333 [2021-06-05 04:17:00,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:00,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49333 states. [2021-06-05 04:17:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49333 to 48899. [2021-06-05 04:17:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6953045114319605) internal successors, (180693), 48898 states have internal predecessors, (180693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180693 transitions. [2021-06-05 04:17:02,304 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180693 transitions. Word has length 22 [2021-06-05 04:17:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:02,304 INFO L482 AbstractCegarLoop]: Abstraction has 48899 states and 180693 transitions. [2021-06-05 04:17:02,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180693 transitions. [2021-06-05 04:17:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:02,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:02,311 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:02,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21508,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:02,517 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:02,517 INFO L82 PathProgramCache]: Analyzing trace with hash 796339978, now seen corresponding path program 143 times [2021-06-05 04:17:02,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:02,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514084525] [2021-06-05 04:17:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:02,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:02,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514084525] [2021-06-05 04:17:02,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514084525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:02,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206342896] [2021-06-05 04:17:02,573 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 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 04:17:02,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:17:02,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:02,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:02,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206342896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:02,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:02,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:02,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024037707] [2021-06-05 04:17:02,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:02,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:02,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:02,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:02,636 INFO L87 Difference]: Start difference. First operand 48899 states and 180693 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:02,943 INFO L93 Difference]: Finished difference Result 55383 states and 202292 transitions. [2021-06-05 04:17:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:02,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:03,083 INFO L225 Difference]: With dead ends: 55383 [2021-06-05 04:17:03,083 INFO L226 Difference]: Without dead ends: 55383 [2021-06-05 04:17:03,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:17:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55383 states. [2021-06-05 04:17:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55383 to 46016. [2021-06-05 04:17:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46016 states, 46015 states have (on average 3.6818428773226124) internal successors, (169420), 46015 states have internal predecessors, (169420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46016 states to 46016 states and 169420 transitions. [2021-06-05 04:17:04,382 INFO L78 Accepts]: Start accepts. Automaton has 46016 states and 169420 transitions. Word has length 22 [2021-06-05 04:17:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:04,382 INFO L482 AbstractCegarLoop]: Abstraction has 46016 states and 169420 transitions. [2021-06-05 04:17:04,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 46016 states and 169420 transitions. [2021-06-05 04:17:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:04,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:04,390 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:04,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21509 [2021-06-05 04:17:04,590 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1495794009, now seen corresponding path program 144 times [2021-06-05 04:17:04,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:04,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678494830] [2021-06-05 04:17:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:04,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:04,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678494830] [2021-06-05 04:17:04,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678494830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:04,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187053804] [2021-06-05 04:17:04,662 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 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 04:17:04,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:17:04,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:04,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187053804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:04,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:04,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:04,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125368717] [2021-06-05 04:17:04,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:04,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:04,730 INFO L87 Difference]: Start difference. First operand 46016 states and 169420 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:05,112 INFO L93 Difference]: Finished difference Result 46465 states and 170554 transitions. [2021-06-05 04:17:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:17:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:05,225 INFO L225 Difference]: With dead ends: 46465 [2021-06-05 04:17:05,225 INFO L226 Difference]: Without dead ends: 46461 [2021-06-05 04:17:05,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:17:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46461 states. [2021-06-05 04:17:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46461 to 46018. [2021-06-05 04:17:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46018 states, 46017 states have (on average 3.6818349740313363) internal successors, (169427), 46017 states have internal predecessors, (169427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46018 states to 46018 states and 169427 transitions. [2021-06-05 04:17:06,477 INFO L78 Accepts]: Start accepts. Automaton has 46018 states and 169427 transitions. Word has length 22 [2021-06-05 04:17:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:06,478 INFO L482 AbstractCegarLoop]: Abstraction has 46018 states and 169427 transitions. [2021-06-05 04:17:06,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 46018 states and 169427 transitions. [2021-06-05 04:17:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:06,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:06,485 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:06,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21510 [2021-06-05 04:17:06,685 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1334195556, now seen corresponding path program 145 times [2021-06-05 04:17:06,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:06,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633564973] [2021-06-05 04:17:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:06,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:06,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633564973] [2021-06-05 04:17:06,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633564973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:06,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119667482] [2021-06-05 04:17:06,747 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 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 04:17:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:06,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:06,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119667482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:06,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:06,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:06,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948471600] [2021-06-05 04:17:06,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:06,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:06,810 INFO L87 Difference]: Start difference. First operand 46018 states and 169427 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:07,133 INFO L93 Difference]: Finished difference Result 53081 states and 194778 transitions. [2021-06-05 04:17:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:07,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:07,264 INFO L225 Difference]: With dead ends: 53081 [2021-06-05 04:17:07,264 INFO L226 Difference]: Without dead ends: 53081 [2021-06-05 04:17:07,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:17:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53081 states. [2021-06-05 04:17:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53081 to 50036. [2021-06-05 04:17:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50036 states, 50035 states have (on average 3.6892775057459777) internal successors, (184593), 50035 states have internal predecessors, (184593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50036 states to 50036 states and 184593 transitions. [2021-06-05 04:17:08,706 INFO L78 Accepts]: Start accepts. Automaton has 50036 states and 184593 transitions. Word has length 22 [2021-06-05 04:17:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:08,707 INFO L482 AbstractCegarLoop]: Abstraction has 50036 states and 184593 transitions. [2021-06-05 04:17:08,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 50036 states and 184593 transitions. [2021-06-05 04:17:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:08,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:08,714 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:08,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21511 [2021-06-05 04:17:08,914 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081699, now seen corresponding path program 146 times [2021-06-05 04:17:08,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:08,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416268209] [2021-06-05 04:17:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:08,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:08,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416268209] [2021-06-05 04:17:08,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416268209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:08,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116914157] [2021-06-05 04:17:08,981 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 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 04:17:09,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:09,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:09,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:09,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:09,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116914157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:09,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:09,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:09,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726866000] [2021-06-05 04:17:09,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:09,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:09,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:09,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:09,041 INFO L87 Difference]: Start difference. First operand 50036 states and 184593 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:09,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:09,438 INFO L93 Difference]: Finished difference Result 50456 states and 185678 transitions. [2021-06-05 04:17:09,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:09,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:09,567 INFO L225 Difference]: With dead ends: 50456 [2021-06-05 04:17:09,568 INFO L226 Difference]: Without dead ends: 50451 [2021-06-05 04:17:09,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:17:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50451 states. [2021-06-05 04:17:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50451 to 50049. [2021-06-05 04:17:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50049 states, 50048 states have (on average 3.6890185421994883) internal successors, (184628), 50048 states have internal predecessors, (184628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 184628 transitions. [2021-06-05 04:17:10,817 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 184628 transitions. Word has length 22 [2021-06-05 04:17:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:10,817 INFO L482 AbstractCegarLoop]: Abstraction has 50049 states and 184628 transitions. [2021-06-05 04:17:10,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:10,817 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 184628 transitions. [2021-06-05 04:17:11,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:11,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:11,027 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:11,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21512 [2021-06-05 04:17:11,237 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:11,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:11,237 INFO L82 PathProgramCache]: Analyzing trace with hash 827849290, now seen corresponding path program 147 times [2021-06-05 04:17:11,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:11,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072512166] [2021-06-05 04:17:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:11,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:11,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072512166] [2021-06-05 04:17:11,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072512166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:11,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271150600] [2021-06-05 04:17:11,296 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 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 04:17:11,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:17:11,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:11,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271150600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:11,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:11,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:11,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394314647] [2021-06-05 04:17:11,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:11,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:11,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:11,357 INFO L87 Difference]: Start difference. First operand 50049 states and 184628 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:11,753 INFO L93 Difference]: Finished difference Result 51683 states and 189732 transitions. [2021-06-05 04:17:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:11,871 INFO L225 Difference]: With dead ends: 51683 [2021-06-05 04:17:11,872 INFO L226 Difference]: Without dead ends: 51683 [2021-06-05 04:17:11,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:11,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2021-06-05 04:17:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 51187. [2021-06-05 04:17:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.689856601414449) internal successors, (188869), 51186 states have internal predecessors, (188869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188869 transitions. [2021-06-05 04:17:13,040 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188869 transitions. Word has length 22 [2021-06-05 04:17:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:13,041 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188869 transitions. [2021-06-05 04:17:13,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188869 transitions. [2021-06-05 04:17:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:13,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:13,047 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:13,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21513 [2021-06-05 04:17:13,248 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:13,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1301422211, now seen corresponding path program 148 times [2021-06-05 04:17:13,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:13,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731767928] [2021-06-05 04:17:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:13,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:13,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731767928] [2021-06-05 04:17:13,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731767928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:13,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458479594] [2021-06-05 04:17:13,309 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 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 04:17:13,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:13,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:13,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458479594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:13,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:13,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:13,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951473608] [2021-06-05 04:17:13,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:13,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:13,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:13,363 INFO L87 Difference]: Start difference. First operand 51187 states and 188869 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:13,971 INFO L93 Difference]: Finished difference Result 51540 states and 189639 transitions. [2021-06-05 04:17:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:14,111 INFO L225 Difference]: With dead ends: 51540 [2021-06-05 04:17:14,112 INFO L226 Difference]: Without dead ends: 51537 [2021-06-05 04:17:14,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:17:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51537 states. [2021-06-05 04:17:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51537 to 51187. [2021-06-05 04:17:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.6897003086781544) internal successors, (188861), 51186 states have internal predecessors, (188861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188861 transitions. [2021-06-05 04:17:15,452 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188861 transitions. Word has length 22 [2021-06-05 04:17:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:15,453 INFO L482 AbstractCegarLoop]: Abstraction has 51187 states and 188861 transitions. [2021-06-05 04:17:15,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188861 transitions. [2021-06-05 04:17:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:15,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:15,460 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:15,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21514 [2021-06-05 04:17:15,660 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:15,660 INFO L82 PathProgramCache]: Analyzing trace with hash -471117200, now seen corresponding path program 149 times [2021-06-05 04:17:15,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:15,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601099361] [2021-06-05 04:17:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:15,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:15,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601099361] [2021-06-05 04:17:15,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601099361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:15,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794284897] [2021-06-05 04:17:15,719 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 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 04:17:15,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:15,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:15,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:15,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794284897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:15,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:15,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:15,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640603974] [2021-06-05 04:17:15,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:15,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:15,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:15,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:15,780 INFO L87 Difference]: Start difference. First operand 51187 states and 188861 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:16,093 INFO L93 Difference]: Finished difference Result 54243 states and 197469 transitions. [2021-06-05 04:17:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:16,554 INFO L225 Difference]: With dead ends: 54243 [2021-06-05 04:17:16,554 INFO L226 Difference]: Without dead ends: 54243 [2021-06-05 04:17:16,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:16,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54243 states. [2021-06-05 04:17:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54243 to 19825. [2021-06-05 04:17:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 3.5682001614205006) internal successors, (70736), 19824 states have internal predecessors, (70736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 70736 transitions. [2021-06-05 04:17:17,084 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 70736 transitions. Word has length 22 [2021-06-05 04:17:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:17,084 INFO L482 AbstractCegarLoop]: Abstraction has 19825 states and 70736 transitions. [2021-06-05 04:17:17,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 70736 transitions. [2021-06-05 04:17:17,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:17,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:17,091 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:17,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:17,292 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:17,293 INFO L82 PathProgramCache]: Analyzing trace with hash 228336831, now seen corresponding path program 150 times [2021-06-05 04:17:17,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:17,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935530780] [2021-06-05 04:17:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:17,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:17,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935530780] [2021-06-05 04:17:17,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935530780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:17,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124428474] [2021-06-05 04:17:17,355 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 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 04:17:17,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:17:17,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:17,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124428474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:17,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:17,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:17,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054878186] [2021-06-05 04:17:17,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:17,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:17,412 INFO L87 Difference]: Start difference. First operand 19825 states and 70736 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:17,833 INFO L93 Difference]: Finished difference Result 20359 states and 72090 transitions. [2021-06-05 04:17:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:17,867 INFO L225 Difference]: With dead ends: 20359 [2021-06-05 04:17:17,867 INFO L226 Difference]: Without dead ends: 20355 [2021-06-05 04:17:17,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:17:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-06-05 04:17:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 19828. [2021-06-05 04:17:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19828 states, 19827 states have (on average 3.568215060271347) internal successors, (70747), 19827 states have internal predecessors, (70747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19828 states to 19828 states and 70747 transitions. [2021-06-05 04:17:18,192 INFO L78 Accepts]: Start accepts. Automaton has 19828 states and 70747 transitions. Word has length 22 [2021-06-05 04:17:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:18,193 INFO L482 AbstractCegarLoop]: Abstraction has 19828 states and 70747 transitions. [2021-06-05 04:17:18,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 19828 states and 70747 transitions. [2021-06-05 04:17:18,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:18,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:18,199 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:18,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21516,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:18,399 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:18,400 INFO L82 PathProgramCache]: Analyzing trace with hash 66738378, now seen corresponding path program 151 times [2021-06-05 04:17:18,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:18,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130326493] [2021-06-05 04:17:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:18,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:18,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130326493] [2021-06-05 04:17:18,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130326493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:18,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543925929] [2021-06-05 04:17:18,460 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 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 04:17:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:18,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:18,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543925929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:18,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:18,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129214309] [2021-06-05 04:17:18,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:18,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:18,519 INFO L87 Difference]: Start difference. First operand 19828 states and 70747 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:18,714 INFO L93 Difference]: Finished difference Result 28252 states and 100763 transitions. [2021-06-05 04:17:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:18,773 INFO L225 Difference]: With dead ends: 28252 [2021-06-05 04:17:18,773 INFO L226 Difference]: Without dead ends: 28252 [2021-06-05 04:17:18,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:17:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-06-05 04:17:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 19605. [2021-06-05 04:17:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.569118547235258) internal successors, (69969), 19604 states have internal predecessors, (69969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69969 transitions. [2021-06-05 04:17:19,319 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69969 transitions. Word has length 22 [2021-06-05 04:17:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:19,319 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69969 transitions. [2021-06-05 04:17:19,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69969 transitions. [2021-06-05 04:17:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:19,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:19,326 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:19,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21517,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:19,526 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:19,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1322428419, now seen corresponding path program 152 times [2021-06-05 04:17:19,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:19,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213296635] [2021-06-05 04:17:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:19,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:19,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213296635] [2021-06-05 04:17:19,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213296635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:19,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602757291] [2021-06-05 04:17:19,598 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 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 04:17:19,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:19,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:19,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602757291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:19,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:19,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:19,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968050333] [2021-06-05 04:17:19,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:19,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:19,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:19,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:19,658 INFO L87 Difference]: Start difference. First operand 19605 states and 69969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:19,897 INFO L93 Difference]: Finished difference Result 20123 states and 71290 transitions. [2021-06-05 04:17:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:19,935 INFO L225 Difference]: With dead ends: 20123 [2021-06-05 04:17:19,935 INFO L226 Difference]: Without dead ends: 20118 [2021-06-05 04:17:19,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:17:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20118 states. [2021-06-05 04:17:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20118 to 19607. [2021-06-05 04:17:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19607 states, 19606 states have (on average 3.5691114964806694) internal successors, (69976), 19606 states have internal predecessors, (69976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19607 states to 19607 states and 69976 transitions. [2021-06-05 04:17:20,529 INFO L78 Accepts]: Start accepts. Automaton has 19607 states and 69976 transitions. Word has length 22 [2021-06-05 04:17:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:20,529 INFO L482 AbstractCegarLoop]: Abstraction has 19607 states and 69976 transitions. [2021-06-05 04:17:20,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:20,529 INFO L276 IsEmpty]: Start isEmpty. Operand 19607 states and 69976 transitions. [2021-06-05 04:17:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:20,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:20,535 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:20,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21518,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:20,736 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash -439607888, now seen corresponding path program 153 times [2021-06-05 04:17:20,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:20,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270826032] [2021-06-05 04:17:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:20,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:20,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270826032] [2021-06-05 04:17:20,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270826032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:20,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818304517] [2021-06-05 04:17:20,798 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 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 04:17:20,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:17:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:20,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:20,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:20,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818304517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:20,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:20,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:20,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804765160] [2021-06-05 04:17:20,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:20,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:20,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:20,865 INFO L87 Difference]: Start difference. First operand 19607 states and 69976 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:21,090 INFO L93 Difference]: Finished difference Result 21427 states and 75723 transitions. [2021-06-05 04:17:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:21,127 INFO L225 Difference]: With dead ends: 21427 [2021-06-05 04:17:21,128 INFO L226 Difference]: Without dead ends: 21427 [2021-06-05 04:17:21,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:17:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21427 states. [2021-06-05 04:17:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21427 to 19699. [2021-06-05 04:17:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19699 states, 19698 states have (on average 3.572240836633161) internal successors, (70366), 19698 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19699 states to 19699 states and 70366 transitions. [2021-06-05 04:17:21,472 INFO L78 Accepts]: Start accepts. Automaton has 19699 states and 70366 transitions. Word has length 22 [2021-06-05 04:17:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:21,472 INFO L482 AbstractCegarLoop]: Abstraction has 19699 states and 70366 transitions. [2021-06-05 04:17:21,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 19699 states and 70366 transitions. [2021-06-05 04:17:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:21,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:21,478 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:21,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21519 [2021-06-05 04:17:21,679 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash 879529279, now seen corresponding path program 154 times [2021-06-05 04:17:21,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:21,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79402105] [2021-06-05 04:17:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:21,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:21,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79402105] [2021-06-05 04:17:21,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79402105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:21,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141501167] [2021-06-05 04:17:21,752 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 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 04:17:21,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:21,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:21,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:21,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141501167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:21,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:21,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:21,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122414655] [2021-06-05 04:17:21,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:21,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:21,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:21,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:21,806 INFO L87 Difference]: Start difference. First operand 19699 states and 70366 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:22,030 INFO L93 Difference]: Finished difference Result 20188 states and 71639 transitions. [2021-06-05 04:17:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:17:22,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:22,226 INFO L225 Difference]: With dead ends: 20188 [2021-06-05 04:17:22,226 INFO L226 Difference]: Without dead ends: 20182 [2021-06-05 04:17:22,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:17:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20182 states. [2021-06-05 04:17:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20182 to 19713. [2021-06-05 04:17:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19712 states have (on average 3.571580762987013) internal successors, (70403), 19712 states have internal predecessors, (70403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 70403 transitions. [2021-06-05 04:17:22,525 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 70403 transitions. Word has length 22 [2021-06-05 04:17:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:22,525 INFO L482 AbstractCegarLoop]: Abstraction has 19713 states and 70403 transitions. [2021-06-05 04:17:22,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 70403 transitions. [2021-06-05 04:17:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:22,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:22,531 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:22,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21520,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:22,731 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:22,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1043527050, now seen corresponding path program 155 times [2021-06-05 04:17:22,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:22,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953992325] [2021-06-05 04:17:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:22,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:22,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953992325] [2021-06-05 04:17:22,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953992325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:22,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305360330] [2021-06-05 04:17:22,823 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 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 04:17:22,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:22,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305360330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:22,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:22,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:22,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490490138] [2021-06-05 04:17:22,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:22,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:22,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:22,884 INFO L87 Difference]: Start difference. First operand 19713 states and 70403 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:23,200 INFO L93 Difference]: Finished difference Result 20611 states and 72663 transitions. [2021-06-05 04:17:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:17:23,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:23,235 INFO L225 Difference]: With dead ends: 20611 [2021-06-05 04:17:23,236 INFO L226 Difference]: Without dead ends: 20611 [2021-06-05 04:17:23,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:17:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2021-06-05 04:17:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 19594. [2021-06-05 04:17:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 3.5719389577910476) internal successors, (69985), 19593 states have internal predecessors, (69985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 69985 transitions. [2021-06-05 04:17:23,656 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 69985 transitions. Word has length 22 [2021-06-05 04:17:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:23,656 INFO L482 AbstractCegarLoop]: Abstraction has 19594 states and 69985 transitions. [2021-06-05 04:17:23,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 69985 transitions. [2021-06-05 04:17:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:23,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:23,662 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:23,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21521 [2021-06-05 04:17:23,877 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:23,877 INFO L82 PathProgramCache]: Analyzing trace with hash 19812039, now seen corresponding path program 156 times [2021-06-05 04:17:23,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:23,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235006699] [2021-06-05 04:17:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:23,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235006699] [2021-06-05 04:17:23,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235006699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945147196] [2021-06-05 04:17:23,934 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 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 04:17:23,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:17:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:24,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945147196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:24,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:24,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:24,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534767119] [2021-06-05 04:17:24,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:24,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:24,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:24,007 INFO L87 Difference]: Start difference. First operand 19594 states and 69985 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:17:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:24,172 INFO L93 Difference]: Finished difference Result 19840 states and 70288 transitions. [2021-06-05 04:17:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:17:24,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:17:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:24,207 INFO L225 Difference]: With dead ends: 19840 [2021-06-05 04:17:24,207 INFO L226 Difference]: Without dead ends: 19840 [2021-06-05 04:17:24,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2021-06-05 04:17:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 19605. [2021-06-05 04:17:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.5676902672923894) internal successors, (69941), 19604 states have internal predecessors, (69941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69941 transitions. [2021-06-05 04:17:24,536 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69941 transitions. Word has length 22 [2021-06-05 04:17:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:24,536 INFO L482 AbstractCegarLoop]: Abstraction has 19605 states and 69941 transitions. [2021-06-05 04:17:24,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:17:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69941 transitions. [2021-06-05 04:17:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:24,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:24,542 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:24,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21522 [2021-06-05 04:17:24,743 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1103102172, now seen corresponding path program 157 times [2021-06-05 04:17:24,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:24,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332496239] [2021-06-05 04:17:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:24,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:24,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332496239] [2021-06-05 04:17:24,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332496239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:24,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844218084] [2021-06-05 04:17:24,800 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 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 04:17:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:24,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:24,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844218084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:24,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:24,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:24,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287465373] [2021-06-05 04:17:24,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:24,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:24,854 INFO L87 Difference]: Start difference. First operand 19605 states and 69941 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:17:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:25,120 INFO L93 Difference]: Finished difference Result 19868 states and 70319 transitions. [2021-06-05 04:17:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:25,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:17:25,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:25,155 INFO L225 Difference]: With dead ends: 19868 [2021-06-05 04:17:25,155 INFO L226 Difference]: Without dead ends: 19864 [2021-06-05 04:17:25,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2021-06-05 04:17:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 18102. [2021-06-05 04:17:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.551682227501243) internal successors, (64289), 18101 states have internal predecessors, (64289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64289 transitions. [2021-06-05 04:17:25,472 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64289 transitions. Word has length 22 [2021-06-05 04:17:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:25,472 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64289 transitions. [2021-06-05 04:17:25,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:17:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64289 transitions. [2021-06-05 04:17:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:25,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:25,478 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:25,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21523 [2021-06-05 04:17:25,678 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1759904349, now seen corresponding path program 158 times [2021-06-05 04:17:25,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:25,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211943937] [2021-06-05 04:17:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:25,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211943937] [2021-06-05 04:17:25,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211943937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:25,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687166374] [2021-06-05 04:17:25,734 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 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 04:17:25,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:25,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:25,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:25,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687166374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:25,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:25,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:25,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649804628] [2021-06-05 04:17:25,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:25,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:25,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:25,792 INFO L87 Difference]: Start difference. First operand 18102 states and 64289 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:17:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:25,982 INFO L93 Difference]: Finished difference Result 18321 states and 64608 transitions. [2021-06-05 04:17:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:25,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:17:25,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:26,019 INFO L225 Difference]: With dead ends: 18321 [2021-06-05 04:17:26,019 INFO L226 Difference]: Without dead ends: 18320 [2021-06-05 04:17:26,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18320 states. [2021-06-05 04:17:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18320 to 18102. [2021-06-05 04:17:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.5440583393182696) internal successors, (64151), 18101 states have internal predecessors, (64151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64151 transitions. [2021-06-05 04:17:26,396 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64151 transitions. Word has length 22 [2021-06-05 04:17:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:26,396 INFO L482 AbstractCegarLoop]: Abstraction has 18102 states and 64151 transitions. [2021-06-05 04:17:26,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:17:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64151 transitions. [2021-06-05 04:17:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:26,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:26,402 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:26,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21524 [2021-06-05 04:17:26,609 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:26,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:26,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1612644214, now seen corresponding path program 159 times [2021-06-05 04:17:26,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:26,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710203163] [2021-06-05 04:17:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:26,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:26,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710203163] [2021-06-05 04:17:26,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710203163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:26,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389715437] [2021-06-05 04:17:26,663 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 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 04:17:26,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:26,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:26,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:26,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:26,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389715437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:26,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:26,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:26,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641962840] [2021-06-05 04:17:26,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:26,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:26,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:26,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:26,723 INFO L87 Difference]: Start difference. First operand 18102 states and 64151 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:17:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:26,838 INFO L93 Difference]: Finished difference Result 18502 states and 64639 transitions. [2021-06-05 04:17:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:17:26,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:17:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:26,869 INFO L225 Difference]: With dead ends: 18502 [2021-06-05 04:17:26,870 INFO L226 Difference]: Without dead ends: 18502 [2021-06-05 04:17:26,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2021-06-05 04:17:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18082. [2021-06-05 04:17:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.528565897903877) internal successors, (63800), 18081 states have internal predecessors, (63800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63800 transitions. [2021-06-05 04:17:27,166 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63800 transitions. Word has length 22 [2021-06-05 04:17:27,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:27,166 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63800 transitions. [2021-06-05 04:17:27,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:17:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63800 transitions. [2021-06-05 04:17:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:27,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:27,172 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:27,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21525,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:27,372 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:27,373 INFO L82 PathProgramCache]: Analyzing trace with hash -824449639, now seen corresponding path program 160 times [2021-06-05 04:17:27,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:27,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088181171] [2021-06-05 04:17:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:27,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:27,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088181171] [2021-06-05 04:17:27,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088181171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:27,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662122762] [2021-06-05 04:17:27,442 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 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 04:17:27,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:27,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:27,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:27,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:27,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662122762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:27,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:27,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:17:27,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001042713] [2021-06-05 04:17:27,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:27,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:27,504 INFO L87 Difference]: Start difference. First operand 18082 states and 63800 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:27,724 INFO L93 Difference]: Finished difference Result 18306 states and 64126 transitions. [2021-06-05 04:17:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:17:27,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:27,756 INFO L225 Difference]: With dead ends: 18306 [2021-06-05 04:17:27,756 INFO L226 Difference]: Without dead ends: 18304 [2021-06-05 04:17:27,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:17:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-06-05 04:17:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18082. [2021-06-05 04:17:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.5282893645262985) internal successors, (63795), 18081 states have internal predecessors, (63795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63795 transitions. [2021-06-05 04:17:28,085 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63795 transitions. Word has length 22 [2021-06-05 04:17:28,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:28,085 INFO L482 AbstractCegarLoop]: Abstraction has 18082 states and 63795 transitions. [2021-06-05 04:17:28,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63795 transitions. [2021-06-05 04:17:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:28,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:28,091 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:28,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21526,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:28,291 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash 953275748, now seen corresponding path program 161 times [2021-06-05 04:17:28,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:28,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301694138] [2021-06-05 04:17:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:28,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:28,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301694138] [2021-06-05 04:17:28,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301694138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:28,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62517516] [2021-06-05 04:17:28,350 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 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 04:17:28,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:28,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:28,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62517516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:28,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:28,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:17:28,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427193093] [2021-06-05 04:17:28,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:28,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:28,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:28,416 INFO L87 Difference]: Start difference. First operand 18082 states and 63795 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:28,540 INFO L93 Difference]: Finished difference Result 18305 states and 63748 transitions. [2021-06-05 04:17:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:17:28,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:28,572 INFO L225 Difference]: With dead ends: 18305 [2021-06-05 04:17:28,572 INFO L226 Difference]: Without dead ends: 18305 [2021-06-05 04:17:28,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18305 states. [2021-06-05 04:17:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18305 to 17477. [2021-06-05 04:17:28,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5275806820782787) internal successors, (61648), 17476 states have internal predecessors, (61648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61648 transitions. [2021-06-05 04:17:28,869 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61648 transitions. Word has length 22 [2021-06-05 04:17:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:28,869 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61648 transitions. [2021-06-05 04:17:28,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61648 transitions. [2021-06-05 04:17:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:28,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:28,875 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:29,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21527,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:29,075 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 664955357, now seen corresponding path program 162 times [2021-06-05 04:17:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:29,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191535482] [2021-06-05 04:17:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:29,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:29,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191535482] [2021-06-05 04:17:29,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191535482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:29,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033934863] [2021-06-05 04:17:29,142 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 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 04:17:29,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:17:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:29,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:29,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033934863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:29,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:29,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:29,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368080907] [2021-06-05 04:17:29,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:29,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:29,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:29,206 INFO L87 Difference]: Start difference. First operand 17477 states and 61648 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:29,463 INFO L93 Difference]: Finished difference Result 17705 states and 61981 transitions. [2021-06-05 04:17:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:17:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:29,490 INFO L225 Difference]: With dead ends: 17705 [2021-06-05 04:17:29,490 INFO L226 Difference]: Without dead ends: 17702 [2021-06-05 04:17:29,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17702 states. [2021-06-05 04:17:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17702 to 17477. [2021-06-05 04:17:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5272945754177156) internal successors, (61643), 17476 states have internal predecessors, (61643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61643 transitions. [2021-06-05 04:17:29,766 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61643 transitions. Word has length 22 [2021-06-05 04:17:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:29,766 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 61643 transitions. [2021-06-05 04:17:29,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61643 transitions. [2021-06-05 04:17:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:29,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:29,772 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:29,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21528,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:29,972 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:29,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1107584054, now seen corresponding path program 163 times [2021-06-05 04:17:29,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:29,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549576843] [2021-06-05 04:17:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:30,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:30,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549576843] [2021-06-05 04:17:30,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549576843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:30,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069962453] [2021-06-05 04:17:30,040 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 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 04:17:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:30,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:30,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:30,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069962453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:30,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:30,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:30,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128618269] [2021-06-05 04:17:30,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:30,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:30,103 INFO L87 Difference]: Start difference. First operand 17477 states and 61643 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:30,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:30,247 INFO L93 Difference]: Finished difference Result 18492 states and 64177 transitions. [2021-06-05 04:17:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:17:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:30,277 INFO L225 Difference]: With dead ends: 18492 [2021-06-05 04:17:30,278 INFO L226 Difference]: Without dead ends: 18492 [2021-06-05 04:17:30,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:30,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18492 states. [2021-06-05 04:17:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18492 to 17534. [2021-06-05 04:17:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 17533 states have (on average 3.5194205213026866) internal successors, (61706), 17533 states have internal predecessors, (61706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 61706 transitions. [2021-06-05 04:17:30,562 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 61706 transitions. Word has length 22 [2021-06-05 04:17:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:30,562 INFO L482 AbstractCegarLoop]: Abstraction has 17534 states and 61706 transitions. [2021-06-05 04:17:30,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 61706 transitions. [2021-06-05 04:17:30,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:30,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:30,567 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:30,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21529,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:30,768 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:30,768 INFO L82 PathProgramCache]: Analyzing trace with hash -408130023, now seen corresponding path program 164 times [2021-06-05 04:17:30,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:30,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810080482] [2021-06-05 04:17:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:30,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:30,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810080482] [2021-06-05 04:17:30,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810080482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:30,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186700951] [2021-06-05 04:17:30,834 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 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 04:17:30,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:30,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186700951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:30,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:30,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:30,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566360432] [2021-06-05 04:17:30,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:30,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:30,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:30,894 INFO L87 Difference]: Start difference. First operand 17534 states and 61706 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:31,126 INFO L93 Difference]: Finished difference Result 18165 states and 63327 transitions. [2021-06-05 04:17:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:17:31,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:31,158 INFO L225 Difference]: With dead ends: 18165 [2021-06-05 04:17:31,158 INFO L226 Difference]: Without dead ends: 18161 [2021-06-05 04:17:31,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:17:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18161 states. [2021-06-05 04:17:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18161 to 17542. [2021-06-05 04:17:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17542 states, 17541 states have (on average 3.5194116641012485) internal successors, (61734), 17541 states have internal predecessors, (61734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17542 states to 17542 states and 61734 transitions. [2021-06-05 04:17:31,490 INFO L78 Accepts]: Start accepts. Automaton has 17542 states and 61734 transitions. Word has length 22 [2021-06-05 04:17:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:31,490 INFO L482 AbstractCegarLoop]: Abstraction has 17542 states and 61734 transitions. [2021-06-05 04:17:31,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:31,490 INFO L276 IsEmpty]: Start isEmpty. Operand 17542 states and 61734 transitions. [2021-06-05 04:17:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:31,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:31,495 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:31,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21530,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:31,696 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:31,696 INFO L82 PathProgramCache]: Analyzing trace with hash -569728476, now seen corresponding path program 165 times [2021-06-05 04:17:31,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:31,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826507374] [2021-06-05 04:17:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:31,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:31,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826507374] [2021-06-05 04:17:31,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826507374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:31,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817857218] [2021-06-05 04:17:31,758 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 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 04:17:31,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:17:31,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:31,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:31,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817857218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:31,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:31,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:31,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023378386] [2021-06-05 04:17:31,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:31,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:31,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:31,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:31,823 INFO L87 Difference]: Start difference. First operand 17542 states and 61734 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:31,995 INFO L93 Difference]: Finished difference Result 23520 states and 82630 transitions. [2021-06-05 04:17:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:17:31,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:32,036 INFO L225 Difference]: With dead ends: 23520 [2021-06-05 04:17:32,036 INFO L226 Difference]: Without dead ends: 23520 [2021-06-05 04:17:32,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:17:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2021-06-05 04:17:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 18797. [2021-06-05 04:17:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18797 states, 18796 states have (on average 3.5254309427537773) internal successors, (66264), 18796 states have internal predecessors, (66264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18797 states to 18797 states and 66264 transitions. [2021-06-05 04:17:32,376 INFO L78 Accepts]: Start accepts. Automaton has 18797 states and 66264 transitions. Word has length 22 [2021-06-05 04:17:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:32,376 INFO L482 AbstractCegarLoop]: Abstraction has 18797 states and 66264 transitions. [2021-06-05 04:17:32,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 18797 states and 66264 transitions. [2021-06-05 04:17:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:32,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:32,382 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:32,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21531 [2021-06-05 04:17:32,582 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:32,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:32,583 INFO L82 PathProgramCache]: Analyzing trace with hash 685961565, now seen corresponding path program 166 times [2021-06-05 04:17:32,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:32,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194147152] [2021-06-05 04:17:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:32,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:32,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194147152] [2021-06-05 04:17:32,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194147152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:32,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982337951] [2021-06-05 04:17:32,649 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 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 04:17:32,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:32,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:32,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:32,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982337951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:32,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:32,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:32,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987408097] [2021-06-05 04:17:32,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:32,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:32,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:32,708 INFO L87 Difference]: Start difference. First operand 18797 states and 66264 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:32,938 INFO L93 Difference]: Finished difference Result 19410 states and 67835 transitions. [2021-06-05 04:17:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:17:32,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:32,971 INFO L225 Difference]: With dead ends: 19410 [2021-06-05 04:17:32,971 INFO L226 Difference]: Without dead ends: 19405 [2021-06-05 04:17:32,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:17:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19405 states. [2021-06-05 04:17:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19405 to 18800. [2021-06-05 04:17:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18799 states have (on average 3.5254534815681686) internal successors, (66275), 18799 states have internal predecessors, (66275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 66275 transitions. [2021-06-05 04:17:33,426 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 66275 transitions. Word has length 22 [2021-06-05 04:17:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:33,426 INFO L482 AbstractCegarLoop]: Abstraction has 18800 states and 66275 transitions. [2021-06-05 04:17:33,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 66275 transitions. [2021-06-05 04:17:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:33,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:33,433 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:33,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21532 [2021-06-05 04:17:33,648 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1076074742, now seen corresponding path program 167 times [2021-06-05 04:17:33,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:33,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640920225] [2021-06-05 04:17:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:33,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:33,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640920225] [2021-06-05 04:17:33,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640920225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:33,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137429735] [2021-06-05 04:17:33,714 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 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 04:17:33,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:17:33,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:33,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137429735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:33,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:33,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:33,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657721174] [2021-06-05 04:17:33,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:33,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:33,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:33,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:33,782 INFO L87 Difference]: Start difference. First operand 18800 states and 66275 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:33,964 INFO L93 Difference]: Finished difference Result 20745 states and 72560 transitions. [2021-06-05 04:17:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:33,964 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:34,004 INFO L225 Difference]: With dead ends: 20745 [2021-06-05 04:17:34,004 INFO L226 Difference]: Without dead ends: 20745 [2021-06-05 04:17:34,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:17:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20745 states. [2021-06-05 04:17:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20745 to 19637. [2021-06-05 04:17:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19637 states, 19636 states have (on average 3.5308616826237524) internal successors, (69332), 19636 states have internal predecessors, (69332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19637 states to 19637 states and 69332 transitions. [2021-06-05 04:17:34,375 INFO L78 Accepts]: Start accepts. Automaton has 19637 states and 69332 transitions. Word has length 22 [2021-06-05 04:17:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:34,375 INFO L482 AbstractCegarLoop]: Abstraction has 19637 states and 69332 transitions. [2021-06-05 04:17:34,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 19637 states and 69332 transitions. [2021-06-05 04:17:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:34,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:34,381 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:34,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21533 [2021-06-05 04:17:34,597 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash 243062425, now seen corresponding path program 168 times [2021-06-05 04:17:34,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:34,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776930967] [2021-06-05 04:17:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:34,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:34,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776930967] [2021-06-05 04:17:34,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776930967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:34,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665795581] [2021-06-05 04:17:34,666 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 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 04:17:34,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:17:34,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:34,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:34,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:34,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665795581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:34,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:34,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:34,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736230616] [2021-06-05 04:17:34,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:34,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:34,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:34,730 INFO L87 Difference]: Start difference. First operand 19637 states and 69332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:34,972 INFO L93 Difference]: Finished difference Result 20239 states and 70880 transitions. [2021-06-05 04:17:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:35,015 INFO L225 Difference]: With dead ends: 20239 [2021-06-05 04:17:35,015 INFO L226 Difference]: Without dead ends: 20233 [2021-06-05 04:17:35,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:17:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-06-05 04:17:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 19639. [2021-06-05 04:17:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19639 states, 19638 states have (on average 3.530858539566147) internal successors, (69339), 19638 states have internal predecessors, (69339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19639 states to 19639 states and 69339 transitions. [2021-06-05 04:17:35,355 INFO L78 Accepts]: Start accepts. Automaton has 19639 states and 69339 transitions. Word has length 22 [2021-06-05 04:17:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:35,355 INFO L482 AbstractCegarLoop]: Abstraction has 19639 states and 69339 transitions. [2021-06-05 04:17:35,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 19639 states and 69339 transitions. [2021-06-05 04:17:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:35,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:35,361 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:35,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21534 [2021-06-05 04:17:35,564 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash 407060196, now seen corresponding path program 169 times [2021-06-05 04:17:35,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:35,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418638729] [2021-06-05 04:17:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:35,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:35,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418638729] [2021-06-05 04:17:35,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418638729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:35,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282208643] [2021-06-05 04:17:35,632 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 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 04:17:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:35,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:35,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282208643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:35,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:35,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:35,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57430096] [2021-06-05 04:17:35,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:35,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:35,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:35,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:35,698 INFO L87 Difference]: Start difference. First operand 19639 states and 69339 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:36,018 INFO L93 Difference]: Finished difference Result 20573 states and 71871 transitions. [2021-06-05 04:17:36,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:36,057 INFO L225 Difference]: With dead ends: 20573 [2021-06-05 04:17:36,057 INFO L226 Difference]: Without dead ends: 20573 [2021-06-05 04:17:36,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:17:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20573 states. [2021-06-05 04:17:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20573 to 19777. [2021-06-05 04:17:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19777 states, 19776 states have (on average 3.531806229773463) internal successors, (69845), 19776 states have internal predecessors, (69845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 69845 transitions. [2021-06-05 04:17:36,423 INFO L78 Accepts]: Start accepts. Automaton has 19777 states and 69845 transitions. Word has length 22 [2021-06-05 04:17:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:36,424 INFO L482 AbstractCegarLoop]: Abstraction has 19777 states and 69845 transitions. [2021-06-05 04:17:36,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 19777 states and 69845 transitions. [2021-06-05 04:17:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:36,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:36,429 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:36,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21535 [2021-06-05 04:17:36,630 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash -601909027, now seen corresponding path program 170 times [2021-06-05 04:17:36,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:36,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640110512] [2021-06-05 04:17:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:36,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:36,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640110512] [2021-06-05 04:17:36,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640110512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:36,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136472177] [2021-06-05 04:17:36,707 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 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 04:17:36,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:36,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:36,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:36,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136472177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:36,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:36,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:36,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148979540] [2021-06-05 04:17:36,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:36,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:36,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:36,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:36,769 INFO L87 Difference]: Start difference. First operand 19777 states and 69845 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:37,035 INFO L93 Difference]: Finished difference Result 20348 states and 71343 transitions. [2021-06-05 04:17:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:37,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:37,070 INFO L225 Difference]: With dead ends: 20348 [2021-06-05 04:17:37,070 INFO L226 Difference]: Without dead ends: 20341 [2021-06-05 04:17:37,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:17:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20341 states. [2021-06-05 04:17:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20341 to 19792. [2021-06-05 04:17:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19792 states, 19791 states have (on average 3.5310494669294124) internal successors, (69883), 19791 states have internal predecessors, (69883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19792 states to 19792 states and 69883 transitions. [2021-06-05 04:17:37,414 INFO L78 Accepts]: Start accepts. Automaton has 19792 states and 69883 transitions. Word has length 22 [2021-06-05 04:17:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:37,414 INFO L482 AbstractCegarLoop]: Abstraction has 19792 states and 69883 transitions. [2021-06-05 04:17:37,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 19792 states and 69883 transitions. [2021-06-05 04:17:37,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:37,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:37,420 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:37,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21536,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:37,620 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash -860396982, now seen corresponding path program 171 times [2021-06-05 04:17:37,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:37,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873391388] [2021-06-05 04:17:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:37,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:37,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873391388] [2021-06-05 04:17:37,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873391388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:37,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893135980] [2021-06-05 04:17:37,692 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 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 04:17:37,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:37,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:37,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:37,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:37,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893135980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:37,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:37,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:37,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260848040] [2021-06-05 04:17:37,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:37,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:37,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:37,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:37,758 INFO L87 Difference]: Start difference. First operand 19792 states and 69883 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:38,121 INFO L93 Difference]: Finished difference Result 21105 states and 73563 transitions. [2021-06-05 04:17:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:17:38,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:38,158 INFO L225 Difference]: With dead ends: 21105 [2021-06-05 04:17:38,158 INFO L226 Difference]: Without dead ends: 21105 [2021-06-05 04:17:38,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:17:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2021-06-05 04:17:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20568. [2021-06-05 04:17:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20568 states, 20567 states have (on average 3.529051393008217) internal successors, (72582), 20567 states have internal predecessors, (72582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20568 states to 20568 states and 72582 transitions. [2021-06-05 04:17:38,602 INFO L78 Accepts]: Start accepts. Automaton has 20568 states and 72582 transitions. Word has length 22 [2021-06-05 04:17:38,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:38,602 INFO L482 AbstractCegarLoop]: Abstraction has 20568 states and 72582 transitions. [2021-06-05 04:17:38,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 20568 states and 72582 transitions. [2021-06-05 04:17:38,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:38,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:38,608 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:38,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21537,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:38,809 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:38,809 INFO L82 PathProgramCache]: Analyzing trace with hash 860487385, now seen corresponding path program 172 times [2021-06-05 04:17:38,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:38,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783123323] [2021-06-05 04:17:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:38,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:38,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783123323] [2021-06-05 04:17:38,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783123323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:38,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083343211] [2021-06-05 04:17:38,859 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 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 04:17:38,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:38,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:38,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:38,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:17:38,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083343211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:38,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:38,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:38,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932608721] [2021-06-05 04:17:38,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:38,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:38,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:38,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:38,918 INFO L87 Difference]: Start difference. First operand 20568 states and 72582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:17:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:39,075 INFO L93 Difference]: Finished difference Result 20897 states and 73323 transitions. [2021-06-05 04:17:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:17:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 22 [2021-06-05 04:17:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:39,114 INFO L225 Difference]: With dead ends: 20897 [2021-06-05 04:17:39,114 INFO L226 Difference]: Without dead ends: 20897 [2021-06-05 04:17:39,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:17:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20897 states. [2021-06-05 04:17:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20897 to 20632. [2021-06-05 04:17:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20632 states, 20631 states have (on average 3.527991856914352) internal successors, (72786), 20631 states have internal predecessors, (72786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:39,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20632 states to 20632 states and 72786 transitions. [2021-06-05 04:17:39,476 INFO L78 Accepts]: Start accepts. Automaton has 20632 states and 72786 transitions. Word has length 22 [2021-06-05 04:17:39,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:39,476 INFO L482 AbstractCegarLoop]: Abstraction has 20632 states and 72786 transitions. [2021-06-05 04:17:39,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:17:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20632 states and 72786 transitions. [2021-06-05 04:17:39,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:39,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:39,482 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:39,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21538,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:39,683 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:39,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:39,683 INFO L82 PathProgramCache]: Analyzing trace with hash 82743140, now seen corresponding path program 173 times [2021-06-05 04:17:39,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:39,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163940268] [2021-06-05 04:17:39,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:39,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:39,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163940268] [2021-06-05 04:17:39,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163940268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:39,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782043008] [2021-06-05 04:17:39,731 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 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 04:17:39,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:39,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:17:39,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782043008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:39,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:39,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:17:39,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118611156] [2021-06-05 04:17:39,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:17:39,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:39,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:17:39,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:17:39,787 INFO L87 Difference]: Start difference. First operand 20632 states and 72786 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:17:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:40,029 INFO L93 Difference]: Finished difference Result 25212 states and 88754 transitions. [2021-06-05 04:17:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:40,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 22 [2021-06-05 04:17:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:40,080 INFO L225 Difference]: With dead ends: 25212 [2021-06-05 04:17:40,080 INFO L226 Difference]: Without dead ends: 25208 [2021-06-05 04:17:40,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25208 states. [2021-06-05 04:17:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25208 to 23517. [2021-06-05 04:17:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.5353376424562) internal successors, (83137), 23516 states have internal predecessors, (83137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83137 transitions. [2021-06-05 04:17:40,560 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83137 transitions. Word has length 22 [2021-06-05 04:17:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:40,560 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83137 transitions. [2021-06-05 04:17:40,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 04:17:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83137 transitions. [2021-06-05 04:17:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:40,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:40,566 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:40,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21539,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:40,767 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:40,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1746631591, now seen corresponding path program 174 times [2021-06-05 04:17:40,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:40,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862657313] [2021-06-05 04:17:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:40,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862657313] [2021-06-05 04:17:40,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862657313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558238551] [2021-06-05 04:17:40,819 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 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 04:17:40,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:17:40,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:40,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:40,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:40,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558238551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:40,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:40,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:40,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11246583] [2021-06-05 04:17:40,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:40,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:40,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:40,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:40,874 INFO L87 Difference]: Start difference. First operand 23517 states and 83137 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:17:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:41,096 INFO L93 Difference]: Finished difference Result 23865 states and 84038 transitions. [2021-06-05 04:17:41,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:41,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-05 04:17:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:41,138 INFO L225 Difference]: With dead ends: 23865 [2021-06-05 04:17:41,138 INFO L226 Difference]: Without dead ends: 23861 [2021-06-05 04:17:41,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2021-06-05 04:17:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 23517. [2021-06-05 04:17:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.535252593978568) internal successors, (83135), 23516 states have internal predecessors, (83135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83135 transitions. [2021-06-05 04:17:41,595 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83135 transitions. Word has length 22 [2021-06-05 04:17:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:41,595 INFO L482 AbstractCegarLoop]: Abstraction has 23517 states and 83135 transitions. [2021-06-05 04:17:41,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:17:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83135 transitions. [2021-06-05 04:17:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:41,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:41,601 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:41,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21540 [2021-06-05 04:17:41,802 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:41,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:41,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1908230044, now seen corresponding path program 175 times [2021-06-05 04:17:41,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:41,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008628036] [2021-06-05 04:17:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:41,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:41,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008628036] [2021-06-05 04:17:41,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008628036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:41,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976176730] [2021-06-05 04:17:41,854 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 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 04:17:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:41,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:41,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:17:41,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976176730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:41,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:41,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:17:41,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936613486] [2021-06-05 04:17:41,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:17:41,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:17:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:17:41,912 INFO L87 Difference]: Start difference. First operand 23517 states and 83135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:17:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:42,126 INFO L93 Difference]: Finished difference Result 26766 states and 93606 transitions. [2021-06-05 04:17:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:42,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-05 04:17:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:42,179 INFO L225 Difference]: With dead ends: 26766 [2021-06-05 04:17:42,179 INFO L226 Difference]: Without dead ends: 26766 [2021-06-05 04:17:42,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26766 states. [2021-06-05 04:17:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26766 to 26009. [2021-06-05 04:17:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.535912027068594) internal successors, (91962), 26008 states have internal predecessors, (91962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91962 transitions. [2021-06-05 04:17:42,661 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91962 transitions. Word has length 22 [2021-06-05 04:17:42,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:42,661 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91962 transitions. [2021-06-05 04:17:42,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:17:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91962 transitions. [2021-06-05 04:17:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:42,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:42,668 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:42,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21541 [2021-06-05 04:17:42,868 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:42,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:42,869 INFO L82 PathProgramCache]: Analyzing trace with hash -263496653, now seen corresponding path program 176 times [2021-06-05 04:17:42,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:42,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066908066] [2021-06-05 04:17:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:42,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:42,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066908066] [2021-06-05 04:17:42,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066908066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:42,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915214598] [2021-06-05 04:17:42,928 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:17:42,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:42,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:42,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:42,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:42,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915214598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:42,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:42,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:42,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938009906] [2021-06-05 04:17:42,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:42,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:42,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:42,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:42,986 INFO L87 Difference]: Start difference. First operand 26009 states and 91962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:43,201 INFO L93 Difference]: Finished difference Result 26395 states and 92871 transitions. [2021-06-05 04:17:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:43,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:43,254 INFO L225 Difference]: With dead ends: 26395 [2021-06-05 04:17:43,254 INFO L226 Difference]: Without dead ends: 26391 [2021-06-05 04:17:43,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:43,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-06-05 04:17:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 26009. [2021-06-05 04:17:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.5357582282374653) internal successors, (91958), 26008 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91958 transitions. [2021-06-05 04:17:43,737 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91958 transitions. Word has length 22 [2021-06-05 04:17:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:43,737 INFO L482 AbstractCegarLoop]: Abstraction has 26009 states and 91958 transitions. [2021-06-05 04:17:43,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91958 transitions. [2021-06-05 04:17:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:43,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:43,743 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:43,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21542 [2021-06-05 04:17:43,944 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:43,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:43,944 INFO L82 PathProgramCache]: Analyzing trace with hash -425095106, now seen corresponding path program 177 times [2021-06-05 04:17:43,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:43,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296214249] [2021-06-05 04:17:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:43,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:43,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296214249] [2021-06-05 04:17:43,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296214249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:43,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928089387] [2021-06-05 04:17:43,998 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 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 04:17:44,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:17:44,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:44,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:44,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:44,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928089387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:44,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:44,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:44,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389222984] [2021-06-05 04:17:44,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:44,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:44,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:44,059 INFO L87 Difference]: Start difference. First operand 26009 states and 91958 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:44,378 INFO L93 Difference]: Finished difference Result 28931 states and 100786 transitions. [2021-06-05 04:17:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:44,378 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:44,423 INFO L225 Difference]: With dead ends: 28931 [2021-06-05 04:17:44,423 INFO L226 Difference]: Without dead ends: 28931 [2021-06-05 04:17:44,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:17:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28931 states. [2021-06-05 04:17:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28931 to 25132. [2021-06-05 04:17:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25132 states, 25131 states have (on average 3.5305399705542957) internal successors, (88726), 25131 states have internal predecessors, (88726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25132 states to 25132 states and 88726 transitions. [2021-06-05 04:17:44,875 INFO L78 Accepts]: Start accepts. Automaton has 25132 states and 88726 transitions. Word has length 22 [2021-06-05 04:17:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:44,875 INFO L482 AbstractCegarLoop]: Abstraction has 25132 states and 88726 transitions. [2021-06-05 04:17:44,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 25132 states and 88726 transitions. [2021-06-05 04:17:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:44,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:44,882 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:45,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21543 [2021-06-05 04:17:45,089 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash 830594935, now seen corresponding path program 178 times [2021-06-05 04:17:45,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:45,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076297370] [2021-06-05 04:17:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:45,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076297370] [2021-06-05 04:17:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076297370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649147635] [2021-06-05 04:17:45,148 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 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 04:17:45,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:45,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:45,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:45,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649147635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:45,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:45,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:45,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628484816] [2021-06-05 04:17:45,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:45,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:45,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:45,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:45,203 INFO L87 Difference]: Start difference. First operand 25132 states and 88726 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:45,455 INFO L93 Difference]: Finished difference Result 25641 states and 90061 transitions. [2021-06-05 04:17:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:17:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:45,502 INFO L225 Difference]: With dead ends: 25641 [2021-06-05 04:17:45,502 INFO L226 Difference]: Without dead ends: 25636 [2021-06-05 04:17:45,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:17:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25636 states. [2021-06-05 04:17:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25636 to 25153. [2021-06-05 04:17:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25153 states, 25152 states have (on average 3.530017493638677) internal successors, (88787), 25152 states have internal predecessors, (88787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25153 states to 25153 states and 88787 transitions. [2021-06-05 04:17:45,961 INFO L78 Accepts]: Start accepts. Automaton has 25153 states and 88787 transitions. Word has length 22 [2021-06-05 04:17:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:45,962 INFO L482 AbstractCegarLoop]: Abstraction has 25153 states and 88787 transitions. [2021-06-05 04:17:45,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 25153 states and 88787 transitions. [2021-06-05 04:17:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:45,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:45,968 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:46,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21544 [2021-06-05 04:17:46,169 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash -931441372, now seen corresponding path program 179 times [2021-06-05 04:17:46,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:46,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25753489] [2021-06-05 04:17:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:46,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:46,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25753489] [2021-06-05 04:17:46,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25753489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:46,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995159094] [2021-06-05 04:17:46,226 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 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 04:17:46,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:46,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:46,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:46,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:46,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995159094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:46,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:46,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:46,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060043510] [2021-06-05 04:17:46,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:46,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:46,295 INFO L87 Difference]: Start difference. First operand 25153 states and 88787 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:46,559 INFO L93 Difference]: Finished difference Result 28403 states and 99337 transitions. [2021-06-05 04:17:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:46,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:17:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:46,616 INFO L225 Difference]: With dead ends: 28403 [2021-06-05 04:17:46,616 INFO L226 Difference]: Without dead ends: 28403 [2021-06-05 04:17:46,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28403 states. [2021-06-05 04:17:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28403 to 27756. [2021-06-05 04:17:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5323365159430735) internal successors, (98040), 27755 states have internal predecessors, (98040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98040 transitions. [2021-06-05 04:17:47,149 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98040 transitions. Word has length 22 [2021-06-05 04:17:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:47,149 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98040 transitions. [2021-06-05 04:17:47,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:17:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98040 transitions. [2021-06-05 04:17:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:47,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:47,156 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:47,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21545 [2021-06-05 04:17:47,357 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:47,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:47,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1530953831, now seen corresponding path program 180 times [2021-06-05 04:17:47,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:47,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322694509] [2021-06-05 04:17:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:47,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:47,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322694509] [2021-06-05 04:17:47,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322694509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:47,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901274236] [2021-06-05 04:17:47,419 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 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 04:17:47,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:17:47,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:47,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:47,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:47,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901274236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:47,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:47,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292602001] [2021-06-05 04:17:47,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:47,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:47,475 INFO L87 Difference]: Start difference. First operand 27756 states and 98040 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:47,714 INFO L93 Difference]: Finished difference Result 28254 states and 99257 transitions. [2021-06-05 04:17:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:47,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:47,768 INFO L225 Difference]: With dead ends: 28254 [2021-06-05 04:17:47,768 INFO L226 Difference]: Without dead ends: 28250 [2021-06-05 04:17:47,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:17:47,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28250 states. [2021-06-05 04:17:48,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28250 to 27756. [2021-06-05 04:17:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5321203386777156) internal successors, (98034), 27755 states have internal predecessors, (98034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98034 transitions. [2021-06-05 04:17:48,269 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98034 transitions. Word has length 22 [2021-06-05 04:17:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:48,269 INFO L482 AbstractCegarLoop]: Abstraction has 27756 states and 98034 transitions. [2021-06-05 04:17:48,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98034 transitions. [2021-06-05 04:17:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:48,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:48,277 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:48,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21546,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:48,493 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1692552284, now seen corresponding path program 181 times [2021-06-05 04:17:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:48,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462510394] [2021-06-05 04:17:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:48,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:48,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462510394] [2021-06-05 04:17:48,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462510394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:48,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70420230] [2021-06-05 04:17:48,551 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 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 04:17:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:48,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:48,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70420230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:48,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:48,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:48,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295845123] [2021-06-05 04:17:48,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:48,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:48,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:48,610 INFO L87 Difference]: Start difference. First operand 27756 states and 98034 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:48,866 INFO L93 Difference]: Finished difference Result 30857 states and 107254 transitions. [2021-06-05 04:17:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:17:48,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:48,931 INFO L225 Difference]: With dead ends: 30857 [2021-06-05 04:17:48,932 INFO L226 Difference]: Without dead ends: 30857 [2021-06-05 04:17:48,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30857 states. [2021-06-05 04:17:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30857 to 22798. [2021-06-05 04:17:49,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22798 states, 22797 states have (on average 3.5037943589068736) internal successors, (79876), 22797 states have internal predecessors, (79876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22798 states to 22798 states and 79876 transitions. [2021-06-05 04:17:49,496 INFO L78 Accepts]: Start accepts. Automaton has 22798 states and 79876 transitions. Word has length 22 [2021-06-05 04:17:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:49,496 INFO L482 AbstractCegarLoop]: Abstraction has 22798 states and 79876 transitions. [2021-06-05 04:17:49,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 22798 states and 79876 transitions. [2021-06-05 04:17:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:49,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:49,503 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:49,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21547 [2021-06-05 04:17:49,703 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash -436862243, now seen corresponding path program 182 times [2021-06-05 04:17:49,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:49,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44997365] [2021-06-05 04:17:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:49,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:49,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44997365] [2021-06-05 04:17:49,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44997365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:49,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136756752] [2021-06-05 04:17:49,788 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 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 04:17:49,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:49,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:49,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:49,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136756752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:49,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:49,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:49,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595104129] [2021-06-05 04:17:49,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:49,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:49,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:49,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:49,843 INFO L87 Difference]: Start difference. First operand 22798 states and 79876 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:50,100 INFO L93 Difference]: Finished difference Result 23497 states and 81715 transitions. [2021-06-05 04:17:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:50,141 INFO L225 Difference]: With dead ends: 23497 [2021-06-05 04:17:50,142 INFO L226 Difference]: Without dead ends: 23492 [2021-06-05 04:17:50,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23492 states. [2021-06-05 04:17:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23492 to 22804. [2021-06-05 04:17:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22804 states, 22803 states have (on average 3.5038810682804895) internal successors, (79899), 22803 states have internal predecessors, (79899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22804 states to 22804 states and 79899 transitions. [2021-06-05 04:17:50,537 INFO L78 Accepts]: Start accepts. Automaton has 22804 states and 79899 transitions. Word has length 22 [2021-06-05 04:17:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:50,537 INFO L482 AbstractCegarLoop]: Abstraction has 22804 states and 79899 transitions. [2021-06-05 04:17:50,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 22804 states and 79899 transitions. [2021-06-05 04:17:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:50,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:50,543 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:50,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21548,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:50,744 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:50,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2096068746, now seen corresponding path program 183 times [2021-06-05 04:17:50,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:50,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384831803] [2021-06-05 04:17:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:50,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:50,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384831803] [2021-06-05 04:17:50,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384831803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:50,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95957330] [2021-06-05 04:17:50,804 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 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 04:17:50,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:50,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:50,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:50,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:50,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95957330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:50,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:50,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:50,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326652029] [2021-06-05 04:17:50,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:50,863 INFO L87 Difference]: Start difference. First operand 22804 states and 79899 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:51,104 INFO L93 Difference]: Finished difference Result 26246 states and 91100 transitions. [2021-06-05 04:17:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:17:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:51,169 INFO L225 Difference]: With dead ends: 26246 [2021-06-05 04:17:51,169 INFO L226 Difference]: Without dead ends: 26246 [2021-06-05 04:17:51,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:17:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26246 states. [2021-06-05 04:17:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26246 to 22958. [2021-06-05 04:17:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 22957 states have (on average 3.504072831816004) internal successors, (80443), 22957 states have internal predecessors, (80443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 80443 transitions. [2021-06-05 04:17:51,688 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 80443 transitions. Word has length 22 [2021-06-05 04:17:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:51,688 INFO L482 AbstractCegarLoop]: Abstraction has 22958 states and 80443 transitions. [2021-06-05 04:17:51,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 80443 transitions. [2021-06-05 04:17:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:51,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:51,694 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:51,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21549,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:51,907 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:51,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:51,907 INFO L82 PathProgramCache]: Analyzing trace with hash -879761383, now seen corresponding path program 184 times [2021-06-05 04:17:51,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:51,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447363270] [2021-06-05 04:17:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:51,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:51,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447363270] [2021-06-05 04:17:51,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447363270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:51,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886552668] [2021-06-05 04:17:51,981 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 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 04:17:52,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:52,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:52,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:52,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:52,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886552668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:52,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:52,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:52,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546061360] [2021-06-05 04:17:52,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:52,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:52,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:52,040 INFO L87 Difference]: Start difference. First operand 22958 states and 80443 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:52,324 INFO L93 Difference]: Finished difference Result 23615 states and 82201 transitions. [2021-06-05 04:17:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:52,370 INFO L225 Difference]: With dead ends: 23615 [2021-06-05 04:17:52,370 INFO L226 Difference]: Without dead ends: 23609 [2021-06-05 04:17:52,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23609 states. [2021-06-05 04:17:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23609 to 22976. [2021-06-05 04:17:52,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22976 states, 22975 states have (on average 3.503808487486398) internal successors, (80500), 22975 states have internal predecessors, (80500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22976 states to 22976 states and 80500 transitions. [2021-06-05 04:17:52,845 INFO L78 Accepts]: Start accepts. Automaton has 22976 states and 80500 transitions. Word has length 22 [2021-06-05 04:17:52,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:52,845 INFO L482 AbstractCegarLoop]: Abstraction has 22976 states and 80500 transitions. [2021-06-05 04:17:52,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand 22976 states and 80500 transitions. [2021-06-05 04:17:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:52,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:52,852 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:53,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21550,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:53,052 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash -715763612, now seen corresponding path program 185 times [2021-06-05 04:17:53,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:53,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253432459] [2021-06-05 04:17:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:53,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:53,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253432459] [2021-06-05 04:17:53,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253432459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:53,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323880022] [2021-06-05 04:17:53,121 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 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 04:17:53,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:53,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:53,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:53,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:53,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323880022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:53,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:53,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:53,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917018329] [2021-06-05 04:17:53,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:53,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:53,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:53,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:53,186 INFO L87 Difference]: Start difference. First operand 22976 states and 80500 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:53,520 INFO L93 Difference]: Finished difference Result 24953 states and 86530 transitions. [2021-06-05 04:17:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:17:53,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:17:53,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:53,571 INFO L225 Difference]: With dead ends: 24953 [2021-06-05 04:17:53,571 INFO L226 Difference]: Without dead ends: 24953 [2021-06-05 04:17:53,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:17:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2021-06-05 04:17:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24405. [2021-06-05 04:17:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5054499262416) internal successors, (85547), 24404 states have internal predecessors, (85547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85547 transitions. [2021-06-05 04:17:54,077 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85547 transitions. Word has length 22 [2021-06-05 04:17:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:54,077 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85547 transitions. [2021-06-05 04:17:54,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:17:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85547 transitions. [2021-06-05 04:17:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:54,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:54,084 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:54,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21551,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:54,284 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2127546611, now seen corresponding path program 186 times [2021-06-05 04:17:54,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:54,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104936375] [2021-06-05 04:17:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:54,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:54,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104936375] [2021-06-05 04:17:54,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104936375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:54,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346931766] [2021-06-05 04:17:54,354 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 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 04:17:54,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:17:54,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:54,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:54,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:54,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346931766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:54,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:54,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:54,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227949313] [2021-06-05 04:17:54,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:54,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:54,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:54,422 INFO L87 Difference]: Start difference. First operand 24405 states and 85547 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:54,694 INFO L93 Difference]: Finished difference Result 24826 states and 86467 transitions. [2021-06-05 04:17:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:17:54,695 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:54,745 INFO L225 Difference]: With dead ends: 24826 [2021-06-05 04:17:54,745 INFO L226 Difference]: Without dead ends: 24822 [2021-06-05 04:17:54,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2021-06-05 04:17:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 24405. [2021-06-05 04:17:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5052860186854615) internal successors, (85543), 24404 states have internal predecessors, (85543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:55,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85543 transitions. [2021-06-05 04:17:55,170 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85543 transitions. Word has length 22 [2021-06-05 04:17:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:55,170 INFO L482 AbstractCegarLoop]: Abstraction has 24405 states and 85543 transitions. [2021-06-05 04:17:55,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:55,171 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85543 transitions. [2021-06-05 04:17:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:55,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:55,177 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:55,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21552 [2021-06-05 04:17:55,378 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1965948158, now seen corresponding path program 187 times [2021-06-05 04:17:55,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:55,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901708197] [2021-06-05 04:17:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:55,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:55,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901708197] [2021-06-05 04:17:55,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901708197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:55,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953793820] [2021-06-05 04:17:55,437 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 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 04:17:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:55,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:55,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953793820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:55,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:55,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:55,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532684321] [2021-06-05 04:17:55,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:55,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:55,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:55,503 INFO L87 Difference]: Start difference. First operand 24405 states and 85543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:55,712 INFO L93 Difference]: Finished difference Result 25900 states and 89533 transitions. [2021-06-05 04:17:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:55,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:55,761 INFO L225 Difference]: With dead ends: 25900 [2021-06-05 04:17:55,761 INFO L226 Difference]: Without dead ends: 25900 [2021-06-05 04:17:55,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-06-05 04:17:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 18287. [2021-06-05 04:17:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 3.4808596740675926) internal successors, (63651), 18286 states have internal predecessors, (63651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 63651 transitions. [2021-06-05 04:17:56,216 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 63651 transitions. Word has length 22 [2021-06-05 04:17:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:56,216 INFO L482 AbstractCegarLoop]: Abstraction has 18287 states and 63651 transitions. [2021-06-05 04:17:56,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 63651 transitions. [2021-06-05 04:17:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:56,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:56,223 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:56,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21553,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:56,424 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1073329097, now seen corresponding path program 188 times [2021-06-05 04:17:56,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:56,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915521232] [2021-06-05 04:17:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:56,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:56,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915521232] [2021-06-05 04:17:56,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915521232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:56,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670729040] [2021-06-05 04:17:56,498 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 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 04:17:56,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:56,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:56,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:56,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670729040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:56,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:56,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:56,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659111676] [2021-06-05 04:17:56,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:56,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:56,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:56,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:56,568 INFO L87 Difference]: Start difference. First operand 18287 states and 63651 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:56,876 INFO L93 Difference]: Finished difference Result 19111 states and 65822 transitions. [2021-06-05 04:17:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:17:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:56,915 INFO L225 Difference]: With dead ends: 19111 [2021-06-05 04:17:56,915 INFO L226 Difference]: Without dead ends: 19106 [2021-06-05 04:17:56,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:17:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2021-06-05 04:17:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 18296. [2021-06-05 04:17:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18296 states, 18295 states have (on average 3.4810057392730256) internal successors, (63685), 18295 states have internal predecessors, (63685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18296 states to 18296 states and 63685 transitions. [2021-06-05 04:17:57,338 INFO L78 Accepts]: Start accepts. Automaton has 18296 states and 63685 transitions. Word has length 22 [2021-06-05 04:17:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:57,338 INFO L482 AbstractCegarLoop]: Abstraction has 18296 states and 63685 transitions. [2021-06-05 04:17:57,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 18296 states and 63685 transitions. [2021-06-05 04:17:57,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:57,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:57,345 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:57,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21554 [2021-06-05 04:17:57,554 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:57,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1459601892, now seen corresponding path program 189 times [2021-06-05 04:17:57,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:57,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87088361] [2021-06-05 04:17:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:57,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:57,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87088361] [2021-06-05 04:17:57,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87088361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:57,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193756742] [2021-06-05 04:17:57,625 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 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 04:17:57,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:57,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:57,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:57,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:57,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193756742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:57,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:57,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:57,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626121754] [2021-06-05 04:17:57,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:57,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:57,701 INFO L87 Difference]: Start difference. First operand 18296 states and 63685 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:57,936 INFO L93 Difference]: Finished difference Result 22104 states and 76218 transitions. [2021-06-05 04:17:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:57,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:57,980 INFO L225 Difference]: With dead ends: 22104 [2021-06-05 04:17:57,980 INFO L226 Difference]: Without dead ends: 22104 [2021-06-05 04:17:57,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:17:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22104 states. [2021-06-05 04:17:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22104 to 17879. [2021-06-05 04:17:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17879 states, 17878 states have (on average 3.4820449714733193) internal successors, (62252), 17878 states have internal predecessors, (62252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17879 states to 17879 states and 62252 transitions. [2021-06-05 04:17:58,408 INFO L78 Accepts]: Start accepts. Automaton has 17879 states and 62252 transitions. Word has length 22 [2021-06-05 04:17:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:58,408 INFO L482 AbstractCegarLoop]: Abstraction has 17879 states and 62252 transitions. [2021-06-05 04:17:58,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 17879 states and 62252 transitions. [2021-06-05 04:17:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:58,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:58,415 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:58,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21555 [2021-06-05 04:17:58,625 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:58,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1516228237, now seen corresponding path program 190 times [2021-06-05 04:17:58,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:58,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54716942] [2021-06-05 04:17:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:58,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:58,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54716942] [2021-06-05 04:17:58,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54716942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:58,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696549514] [2021-06-05 04:17:58,702 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 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 04:17:58,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:58,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:58,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:58,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:58,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696549514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:58,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:58,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:58,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551032441] [2021-06-05 04:17:58,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:58,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:58,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:58,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:58,770 INFO L87 Difference]: Start difference. First operand 17879 states and 62252 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:59,051 INFO L93 Difference]: Finished difference Result 18689 states and 64378 transitions. [2021-06-05 04:17:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:17:59,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:17:59,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:59,088 INFO L225 Difference]: With dead ends: 18689 [2021-06-05 04:17:59,088 INFO L226 Difference]: Without dead ends: 18683 [2021-06-05 04:17:59,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:17:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18683 states. [2021-06-05 04:17:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18683 to 17883. [2021-06-05 04:17:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 3.482104909965328) internal successors, (62267), 17882 states have internal predecessors, (62267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 62267 transitions. [2021-06-05 04:17:59,474 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 62267 transitions. Word has length 22 [2021-06-05 04:17:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:59,474 INFO L482 AbstractCegarLoop]: Abstraction has 17883 states and 62267 transitions. [2021-06-05 04:17:59,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:17:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 62267 transitions. [2021-06-05 04:17:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:17:59,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:59,480 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:59,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21556,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:59,681 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1352230466, now seen corresponding path program 191 times [2021-06-05 04:17:59,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:59,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107678847] [2021-06-05 04:17:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:59,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:59,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107678847] [2021-06-05 04:17:59,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107678847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:59,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336833360] [2021-06-05 04:17:59,752 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 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 04:17:59,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:59,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:59,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:17:59,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:59,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336833360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:59,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:59,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:17:59,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604949024] [2021-06-05 04:17:59,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:59,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:59,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:59,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:59,836 INFO L87 Difference]: Start difference. First operand 17883 states and 62267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:00,119 INFO L93 Difference]: Finished difference Result 19170 states and 65905 transitions. [2021-06-05 04:18:00,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:18:00,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:00,153 INFO L225 Difference]: With dead ends: 19170 [2021-06-05 04:18:00,154 INFO L226 Difference]: Without dead ends: 19170 [2021-06-05 04:18:00,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:18:00,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19170 states. [2021-06-05 04:18:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19170 to 17477. [2021-06-05 04:18:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.482776379034104) internal successors, (60865), 17476 states have internal predecessors, (60865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 60865 transitions. [2021-06-05 04:18:00,533 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 60865 transitions. Word has length 22 [2021-06-05 04:18:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:00,533 INFO L482 AbstractCegarLoop]: Abstraction has 17477 states and 60865 transitions. [2021-06-05 04:18:00,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 60865 transitions. [2021-06-05 04:18:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:00,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:00,539 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:00,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21557 [2021-06-05 04:18:00,739 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1933767607, now seen corresponding path program 192 times [2021-06-05 04:18:00,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:00,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435377701] [2021-06-05 04:18:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:00,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:00,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435377701] [2021-06-05 04:18:00,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435377701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:00,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528961219] [2021-06-05 04:18:00,819 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 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 04:18:00,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:18:00,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:00,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:00,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:00,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528961219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:00,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:00,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:00,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951182167] [2021-06-05 04:18:00,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:00,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:00,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:00,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:00,892 INFO L87 Difference]: Start difference. First operand 17477 states and 60865 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:01,181 INFO L93 Difference]: Finished difference Result 18240 states and 62909 transitions. [2021-06-05 04:18:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:18:01,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:01,214 INFO L225 Difference]: With dead ends: 18240 [2021-06-05 04:18:01,214 INFO L226 Difference]: Without dead ends: 18233 [2021-06-05 04:18:01,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:18:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2021-06-05 04:18:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 17495. [2021-06-05 04:18:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17495 states, 17494 states have (on average 3.4824511261003774) internal successors, (60922), 17494 states have internal predecessors, (60922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 60922 transitions. [2021-06-05 04:18:01,589 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 60922 transitions. Word has length 22 [2021-06-05 04:18:01,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:01,589 INFO L482 AbstractCegarLoop]: Abstraction has 17495 states and 60922 transitions. [2021-06-05 04:18:01,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:01,589 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 60922 transitions. [2021-06-05 04:18:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:01,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:01,595 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:01,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21558,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:01,796 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:01,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1675279652, now seen corresponding path program 193 times [2021-06-05 04:18:01,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:01,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708247876] [2021-06-05 04:18:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:01,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:01,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708247876] [2021-06-05 04:18:01,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708247876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:01,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016660775] [2021-06-05 04:18:01,871 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 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 04:18:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:01,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:01,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016660775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:01,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:01,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:01,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573074163] [2021-06-05 04:18:01,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:01,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:01,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:01,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:01,944 INFO L87 Difference]: Start difference. First operand 17495 states and 60922 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:02,325 INFO L93 Difference]: Finished difference Result 18422 states and 63184 transitions. [2021-06-05 04:18:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:18:02,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:02,358 INFO L225 Difference]: With dead ends: 18422 [2021-06-05 04:18:02,358 INFO L226 Difference]: Without dead ends: 18422 [2021-06-05 04:18:02,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:18:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18422 states. [2021-06-05 04:18:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18422 to 17443. [2021-06-05 04:18:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17443 states, 17442 states have (on average 3.4833161334709324) internal successors, (60756), 17442 states have internal predecessors, (60756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17443 states to 17443 states and 60756 transitions. [2021-06-05 04:18:02,670 INFO L78 Accepts]: Start accepts. Automaton has 17443 states and 60756 transitions. Word has length 22 [2021-06-05 04:18:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:02,670 INFO L482 AbstractCegarLoop]: Abstraction has 17443 states and 60756 transitions. [2021-06-05 04:18:02,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 17443 states and 60756 transitions. [2021-06-05 04:18:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:02,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:02,676 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:02,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21559,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:02,876 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:02,876 INFO L82 PathProgramCache]: Analyzing trace with hash 4885383, now seen corresponding path program 194 times [2021-06-05 04:18:02,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:02,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572081231] [2021-06-05 04:18:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:02,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572081231] [2021-06-05 04:18:02,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572081231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712403630] [2021-06-05 04:18:02,935 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 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 04:18:02,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:18:02,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:02,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:02,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712403630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:02,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:02,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:02,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672603318] [2021-06-05 04:18:02,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:02,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:02,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:02,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:02,994 INFO L87 Difference]: Start difference. First operand 17443 states and 60756 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:03,123 INFO L93 Difference]: Finished difference Result 17724 states and 61191 transitions. [2021-06-05 04:18:03,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:18:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:18:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:03,152 INFO L225 Difference]: With dead ends: 17724 [2021-06-05 04:18:03,152 INFO L226 Difference]: Without dead ends: 17724 [2021-06-05 04:18:03,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:18:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-06-05 04:18:03,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 17454. [2021-06-05 04:18:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17454 states, 17453 states have (on average 3.4828396264252564) internal successors, (60786), 17453 states have internal predecessors, (60786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17454 states to 17454 states and 60786 transitions. [2021-06-05 04:18:03,631 INFO L78 Accepts]: Start accepts. Automaton has 17454 states and 60786 transitions. Word has length 22 [2021-06-05 04:18:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:03,631 INFO L482 AbstractCegarLoop]: Abstraction has 17454 states and 60786 transitions. [2021-06-05 04:18:03,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 17454 states and 60786 transitions. [2021-06-05 04:18:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:03,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:03,637 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:03,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21560,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:03,837 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1088175516, now seen corresponding path program 195 times [2021-06-05 04:18:03,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:03,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094287373] [2021-06-05 04:18:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:03,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:03,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094287373] [2021-06-05 04:18:03,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094287373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:03,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476635548] [2021-06-05 04:18:03,892 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 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 04:18:03,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:18:03,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:03,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:03,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476635548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:03,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:03,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:03,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445103862] [2021-06-05 04:18:03,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:03,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:03,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:03,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:03,949 INFO L87 Difference]: Start difference. First operand 17454 states and 60786 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:04,149 INFO L93 Difference]: Finished difference Result 17701 states and 61136 transitions. [2021-06-05 04:18:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:18:04,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:18:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:04,183 INFO L225 Difference]: With dead ends: 17701 [2021-06-05 04:18:04,183 INFO L226 Difference]: Without dead ends: 17697 [2021-06-05 04:18:04,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:18:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17697 states. [2021-06-05 04:18:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17697 to 16993. [2021-06-05 04:18:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.480637947269303) internal successors, (59143), 16992 states have internal predecessors, (59143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59143 transitions. [2021-06-05 04:18:04,483 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59143 transitions. Word has length 22 [2021-06-05 04:18:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:04,483 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59143 transitions. [2021-06-05 04:18:04,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59143 transitions. [2021-06-05 04:18:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:04,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:04,488 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:04,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21561 [2021-06-05 04:18:04,689 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:04,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1744977693, now seen corresponding path program 196 times [2021-06-05 04:18:04,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:04,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346888825] [2021-06-05 04:18:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:04,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:04,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346888825] [2021-06-05 04:18:04,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346888825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:04,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930122538] [2021-06-05 04:18:04,745 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 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 04:18:04,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:18:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:04,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:04,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:04,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930122538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:04,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:04,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:04,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407290154] [2021-06-05 04:18:04,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:04,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:04,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:04,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:04,800 INFO L87 Difference]: Start difference. First operand 16993 states and 59143 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:04,996 INFO L93 Difference]: Finished difference Result 17251 states and 59526 transitions. [2021-06-05 04:18:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:18:04,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:18:04,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:05,025 INFO L225 Difference]: With dead ends: 17251 [2021-06-05 04:18:05,026 INFO L226 Difference]: Without dead ends: 17250 [2021-06-05 04:18:05,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:18:05,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-06-05 04:18:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 16993. [2021-06-05 04:18:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.4791666666666665) internal successors, (59118), 16992 states have internal predecessors, (59118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59118 transitions. [2021-06-05 04:18:05,312 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59118 transitions. Word has length 22 [2021-06-05 04:18:05,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:05,312 INFO L482 AbstractCegarLoop]: Abstraction has 16993 states and 59118 transitions. [2021-06-05 04:18:05,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59118 transitions. [2021-06-05 04:18:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:05,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:05,318 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:05,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21562 [2021-06-05 04:18:05,519 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:05,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1627570870, now seen corresponding path program 197 times [2021-06-05 04:18:05,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:05,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693838432] [2021-06-05 04:18:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:05,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:05,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693838432] [2021-06-05 04:18:05,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693838432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:05,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669281632] [2021-06-05 04:18:05,589 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 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 04:18:05,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:18:05,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:05,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669281632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:05,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:05,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:05,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213527237] [2021-06-05 04:18:05,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:05,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:05,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:05,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:05,671 INFO L87 Difference]: Start difference. First operand 16993 states and 59118 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:05,800 INFO L93 Difference]: Finished difference Result 17351 states and 59762 transitions. [2021-06-05 04:18:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:18:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:18:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:05,832 INFO L225 Difference]: With dead ends: 17351 [2021-06-05 04:18:05,832 INFO L226 Difference]: Without dead ends: 17351 [2021-06-05 04:18:05,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:18:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17351 states. [2021-06-05 04:18:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17351 to 17008. [2021-06-05 04:18:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.477744458164285) internal successors, (59146), 17007 states have internal predecessors, (59146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59146 transitions. [2021-06-05 04:18:06,128 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59146 transitions. Word has length 22 [2021-06-05 04:18:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:06,128 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59146 transitions. [2021-06-05 04:18:06,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59146 transitions. [2021-06-05 04:18:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:06,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:06,134 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:06,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21563,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:06,334 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash -839376295, now seen corresponding path program 198 times [2021-06-05 04:18:06,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:06,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549759114] [2021-06-05 04:18:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:06,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:06,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549759114] [2021-06-05 04:18:06,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549759114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:06,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757333927] [2021-06-05 04:18:06,392 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 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 04:18:06,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:18:06,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:06,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:06,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:06,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757333927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:06,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:06,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:06,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672036671] [2021-06-05 04:18:06,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:06,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:06,456 INFO L87 Difference]: Start difference. First operand 17008 states and 59146 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:06,682 INFO L93 Difference]: Finished difference Result 17271 states and 59536 transitions. [2021-06-05 04:18:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:18:06,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:06,712 INFO L225 Difference]: With dead ends: 17271 [2021-06-05 04:18:06,712 INFO L226 Difference]: Without dead ends: 17269 [2021-06-05 04:18:06,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:18:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-06-05 04:18:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 17008. [2021-06-05 04:18:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.4775092608925737) internal successors, (59142), 17007 states have internal predecessors, (59142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59142 transitions. [2021-06-05 04:18:07,021 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59142 transitions. Word has length 22 [2021-06-05 04:18:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:07,021 INFO L482 AbstractCegarLoop]: Abstraction has 17008 states and 59142 transitions. [2021-06-05 04:18:07,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59142 transitions. [2021-06-05 04:18:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:07,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:07,027 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:07,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21564 [2021-06-05 04:18:07,241 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:07,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:07,241 INFO L82 PathProgramCache]: Analyzing trace with hash 938349092, now seen corresponding path program 199 times [2021-06-05 04:18:07,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:07,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268888493] [2021-06-05 04:18:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:07,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:07,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268888493] [2021-06-05 04:18:07,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268888493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:07,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652745910] [2021-06-05 04:18:07,298 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 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 04:18:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:07,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:07,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:07,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652745910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:07,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:07,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863532706] [2021-06-05 04:18:07,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:07,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:07,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:07,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:07,364 INFO L87 Difference]: Start difference. First operand 17008 states and 59142 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:07,497 INFO L93 Difference]: Finished difference Result 17397 states and 59814 transitions. [2021-06-05 04:18:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:18:07,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:07,530 INFO L225 Difference]: With dead ends: 17397 [2021-06-05 04:18:07,530 INFO L226 Difference]: Without dead ends: 17397 [2021-06-05 04:18:07,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:18:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17397 states. [2021-06-05 04:18:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17397 to 16977. [2021-06-05 04:18:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16977 states, 16976 states have (on average 3.4736687087653157) internal successors, (58969), 16976 states have internal predecessors, (58969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16977 states to 16977 states and 58969 transitions. [2021-06-05 04:18:07,815 INFO L78 Accepts]: Start accepts. Automaton has 16977 states and 58969 transitions. Word has length 22 [2021-06-05 04:18:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:07,815 INFO L482 AbstractCegarLoop]: Abstraction has 16977 states and 58969 transitions. [2021-06-05 04:18:07,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:07,815 INFO L276 IsEmpty]: Start isEmpty. Operand 16977 states and 58969 transitions. [2021-06-05 04:18:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:07,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:07,820 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:08,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21565 [2021-06-05 04:18:08,021 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash 650028701, now seen corresponding path program 200 times [2021-06-05 04:18:08,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:08,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002146557] [2021-06-05 04:18:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:08,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:08,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002146557] [2021-06-05 04:18:08,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002146557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:08,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042753692] [2021-06-05 04:18:08,081 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 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 04:18:08,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:18:08,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:08,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:08,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:08,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042753692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:08,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:08,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:08,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136025787] [2021-06-05 04:18:08,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:08,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:08,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:08,142 INFO L87 Difference]: Start difference. First operand 16977 states and 58969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:08,327 INFO L93 Difference]: Finished difference Result 19691 states and 67365 transitions. [2021-06-05 04:18:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:18:08,327 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:08,359 INFO L225 Difference]: With dead ends: 19691 [2021-06-05 04:18:08,360 INFO L226 Difference]: Without dead ends: 19688 [2021-06-05 04:18:08,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:18:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19688 states. [2021-06-05 04:18:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19688 to 17043. [2021-06-05 04:18:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17043 states, 17042 states have (on average 3.4742987912216874) internal successors, (59209), 17042 states have internal predecessors, (59209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17043 states to 17043 states and 59209 transitions. [2021-06-05 04:18:08,668 INFO L78 Accepts]: Start accepts. Automaton has 17043 states and 59209 transitions. Word has length 22 [2021-06-05 04:18:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:08,668 INFO L482 AbstractCegarLoop]: Abstraction has 17043 states and 59209 transitions. [2021-06-05 04:18:08,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 17043 states and 59209 transitions. [2021-06-05 04:18:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:08,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:08,673 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:08,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21566 [2021-06-05 04:18:08,874 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1122510710, now seen corresponding path program 201 times [2021-06-05 04:18:08,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:08,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856953314] [2021-06-05 04:18:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:08,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:08,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856953314] [2021-06-05 04:18:08,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856953314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:08,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568772347] [2021-06-05 04:18:08,935 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 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 04:18:08,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:18:08,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:08,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:09,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568772347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:09,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:09,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:09,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940237297] [2021-06-05 04:18:09,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:09,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:09,007 INFO L87 Difference]: Start difference. First operand 17043 states and 59209 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:09,159 INFO L93 Difference]: Finished difference Result 26038 states and 89720 transitions. [2021-06-05 04:18:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:18:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:09,211 INFO L225 Difference]: With dead ends: 26038 [2021-06-05 04:18:09,211 INFO L226 Difference]: Without dead ends: 26038 [2021-06-05 04:18:09,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:18:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26038 states. [2021-06-05 04:18:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26038 to 25505. [2021-06-05 04:18:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.4754548306148054) internal successors, (88638), 25504 states have internal predecessors, (88638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 88638 transitions. [2021-06-05 04:18:09,669 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 88638 transitions. Word has length 22 [2021-06-05 04:18:09,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:09,669 INFO L482 AbstractCegarLoop]: Abstraction has 25505 states and 88638 transitions. [2021-06-05 04:18:09,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 88638 transitions. [2021-06-05 04:18:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:09,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:09,676 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:09,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21567 [2021-06-05 04:18:09,876 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:09,876 INFO L82 PathProgramCache]: Analyzing trace with hash -423056679, now seen corresponding path program 202 times [2021-06-05 04:18:09,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:09,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086638107] [2021-06-05 04:18:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:09,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:09,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086638107] [2021-06-05 04:18:09,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086638107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:09,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51811677] [2021-06-05 04:18:09,942 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 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 04:18:09,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:18:09,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:09,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:09,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:10,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51811677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:10,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:10,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:10,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969418189] [2021-06-05 04:18:10,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:10,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:10,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:10,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:10,003 INFO L87 Difference]: Start difference. First operand 25505 states and 88638 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:10,240 INFO L93 Difference]: Finished difference Result 28515 states and 98094 transitions. [2021-06-05 04:18:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:18:10,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:10,299 INFO L225 Difference]: With dead ends: 28515 [2021-06-05 04:18:10,299 INFO L226 Difference]: Without dead ends: 28511 [2021-06-05 04:18:10,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:18:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28511 states. [2021-06-05 04:18:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28511 to 25686. [2021-06-05 04:18:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25686 states, 25685 states have (on average 3.4768152618259687) internal successors, (89302), 25685 states have internal predecessors, (89302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25686 states to 25686 states and 89302 transitions. [2021-06-05 04:18:10,775 INFO L78 Accepts]: Start accepts. Automaton has 25686 states and 89302 transitions. Word has length 22 [2021-06-05 04:18:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:10,775 INFO L482 AbstractCegarLoop]: Abstraction has 25686 states and 89302 transitions. [2021-06-05 04:18:10,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 25686 states and 89302 transitions. [2021-06-05 04:18:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:10,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:10,781 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:10,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21568 [2021-06-05 04:18:10,982 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:10,982 INFO L82 PathProgramCache]: Analyzing trace with hash -584655132, now seen corresponding path program 203 times [2021-06-05 04:18:10,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:10,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149054891] [2021-06-05 04:18:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:11,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:11,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149054891] [2021-06-05 04:18:11,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149054891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:11,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99344287] [2021-06-05 04:18:11,043 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 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 04:18:11,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:18:11,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:11,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:11,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99344287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:11,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:11,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:11,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700792390] [2021-06-05 04:18:11,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:11,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:11,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:11,110 INFO L87 Difference]: Start difference. First operand 25686 states and 89302 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:11,304 INFO L93 Difference]: Finished difference Result 26560 states and 91297 transitions. [2021-06-05 04:18:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:18:11,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:11,359 INFO L225 Difference]: With dead ends: 26560 [2021-06-05 04:18:11,359 INFO L226 Difference]: Without dead ends: 26560 [2021-06-05 04:18:11,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:18:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-06-05 04:18:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 25734. [2021-06-05 04:18:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.4752263630357905) internal successors, (89428), 25733 states have internal predecessors, (89428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89428 transitions. [2021-06-05 04:18:11,865 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89428 transitions. Word has length 22 [2021-06-05 04:18:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:11,865 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89428 transitions. [2021-06-05 04:18:11,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89428 transitions. [2021-06-05 04:18:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:11,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:11,871 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:12,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21569,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:12,071 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:12,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:12,072 INFO L82 PathProgramCache]: Analyzing trace with hash 671034909, now seen corresponding path program 204 times [2021-06-05 04:18:12,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:12,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928917046] [2021-06-05 04:18:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:12,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:12,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928917046] [2021-06-05 04:18:12,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928917046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:12,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325155558] [2021-06-05 04:18:12,139 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 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 04:18:12,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:18:12,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:12,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325155558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:12,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:12,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:12,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742431686] [2021-06-05 04:18:12,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:12,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:12,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:12,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:12,201 INFO L87 Difference]: Start difference. First operand 25734 states and 89428 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:12,425 INFO L93 Difference]: Finished difference Result 26225 states and 90728 transitions. [2021-06-05 04:18:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:18:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:12,474 INFO L225 Difference]: With dead ends: 26225 [2021-06-05 04:18:12,474 INFO L226 Difference]: Without dead ends: 26220 [2021-06-05 04:18:12,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:18:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-06-05 04:18:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25734. [2021-06-05 04:18:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.475187502428788) internal successors, (89427), 25733 states have internal predecessors, (89427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:12,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89427 transitions. [2021-06-05 04:18:12,917 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89427 transitions. Word has length 22 [2021-06-05 04:18:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:12,917 INFO L482 AbstractCegarLoop]: Abstraction has 25734 states and 89427 transitions. [2021-06-05 04:18:12,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89427 transitions. [2021-06-05 04:18:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:12,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:12,923 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:13,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21570,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:13,123 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:13,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1091001398, now seen corresponding path program 205 times [2021-06-05 04:18:13,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:13,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510391664] [2021-06-05 04:18:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:13,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:13,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510391664] [2021-06-05 04:18:13,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510391664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:13,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512820539] [2021-06-05 04:18:13,186 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 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 04:18:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:13,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:13,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512820539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:13,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:13,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:13,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997083262] [2021-06-05 04:18:13,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:13,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:13,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:13,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:13,258 INFO L87 Difference]: Start difference. First operand 25734 states and 89427 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:13,464 INFO L93 Difference]: Finished difference Result 28702 states and 98967 transitions. [2021-06-05 04:18:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:18:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:13,518 INFO L225 Difference]: With dead ends: 28702 [2021-06-05 04:18:13,518 INFO L226 Difference]: Without dead ends: 28702 [2021-06-05 04:18:13,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:18:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2021-06-05 04:18:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28343. [2021-06-05 04:18:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.469938607014325) internal successors, (98345), 28342 states have internal predecessors, (98345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98345 transitions. [2021-06-05 04:18:14,005 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98345 transitions. Word has length 22 [2021-06-05 04:18:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:14,005 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98345 transitions. [2021-06-05 04:18:14,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98345 transitions. [2021-06-05 04:18:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:14,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:14,012 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:14,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21571 [2021-06-05 04:18:14,212 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash 228135769, now seen corresponding path program 206 times [2021-06-05 04:18:14,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:14,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558175141] [2021-06-05 04:18:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:14,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558175141] [2021-06-05 04:18:14,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558175141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805414506] [2021-06-05 04:18:14,281 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 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 04:18:14,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:18:14,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:14,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:14,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805414506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:14,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:14,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:14,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864096172] [2021-06-05 04:18:14,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:14,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:14,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:14,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:14,343 INFO L87 Difference]: Start difference. First operand 28343 states and 98345 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:14,561 INFO L93 Difference]: Finished difference Result 28805 states and 99574 transitions. [2021-06-05 04:18:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:18:14,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:14,620 INFO L225 Difference]: With dead ends: 28805 [2021-06-05 04:18:14,620 INFO L226 Difference]: Without dead ends: 28799 [2021-06-05 04:18:14,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:18:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28799 states. [2021-06-05 04:18:15,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28799 to 28343. [2021-06-05 04:18:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.4699033236892243) internal successors, (98344), 28342 states have internal predecessors, (98344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98344 transitions. [2021-06-05 04:18:15,110 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98344 transitions. Word has length 22 [2021-06-05 04:18:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:15,110 INFO L482 AbstractCegarLoop]: Abstraction has 28343 states and 98344 transitions. [2021-06-05 04:18:15,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:15,110 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98344 transitions. [2021-06-05 04:18:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:15,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:15,116 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:15,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21572 [2021-06-05 04:18:15,317 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash 392133540, now seen corresponding path program 207 times [2021-06-05 04:18:15,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:15,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404878836] [2021-06-05 04:18:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:15,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404878836] [2021-06-05 04:18:15,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404878836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:15,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243026066] [2021-06-05 04:18:15,383 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 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 04:18:15,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:18:15,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:15,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:15,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:15,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243026066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:15,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:15,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:15,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525449766] [2021-06-05 04:18:15,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:15,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:15,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:15,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:15,450 INFO L87 Difference]: Start difference. First operand 28343 states and 98344 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:15,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:15,699 INFO L93 Difference]: Finished difference Result 29601 states and 101949 transitions. [2021-06-05 04:18:15,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:18:15,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:15,754 INFO L225 Difference]: With dead ends: 29601 [2021-06-05 04:18:15,754 INFO L226 Difference]: Without dead ends: 29601 [2021-06-05 04:18:15,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:18:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-06-05 04:18:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 29306. [2021-06-05 04:18:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463504521412728) internal successors, (101498), 29305 states have internal predecessors, (101498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101498 transitions. [2021-06-05 04:18:16,272 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101498 transitions. Word has length 22 [2021-06-05 04:18:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:16,272 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101498 transitions. [2021-06-05 04:18:16,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101498 transitions. [2021-06-05 04:18:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:16,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:16,280 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:16,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21573 [2021-06-05 04:18:16,485 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash -616835683, now seen corresponding path program 208 times [2021-06-05 04:18:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:16,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563115295] [2021-06-05 04:18:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:16,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:16,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563115295] [2021-06-05 04:18:16,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563115295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:16,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598470704] [2021-06-05 04:18:16,559 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 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 04:18:16,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:18:16,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:16,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:16,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598470704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:16,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:16,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:16,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460939601] [2021-06-05 04:18:16,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:16,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:16,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:16,620 INFO L87 Difference]: Start difference. First operand 29306 states and 101498 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:16,862 INFO L93 Difference]: Finished difference Result 29739 states and 102655 transitions. [2021-06-05 04:18:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:18:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:16,918 INFO L225 Difference]: With dead ends: 29739 [2021-06-05 04:18:16,918 INFO L226 Difference]: Without dead ends: 29732 [2021-06-05 04:18:16,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:18:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29732 states. [2021-06-05 04:18:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29732 to 29306. [2021-06-05 04:18:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463470397543081) internal successors, (101497), 29305 states have internal predecessors, (101497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101497 transitions. [2021-06-05 04:18:17,423 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101497 transitions. Word has length 22 [2021-06-05 04:18:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:17,423 INFO L482 AbstractCegarLoop]: Abstraction has 29306 states and 101497 transitions. [2021-06-05 04:18:17,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101497 transitions. [2021-06-05 04:18:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:17,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:17,431 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:17,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21574 [2021-06-05 04:18:17,631 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:17,631 INFO L82 PathProgramCache]: Analyzing trace with hash -875323638, now seen corresponding path program 209 times [2021-06-05 04:18:17,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:17,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745694916] [2021-06-05 04:18:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:17,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:17,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745694916] [2021-06-05 04:18:17,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745694916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:17,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057960918] [2021-06-05 04:18:17,699 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 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 04:18:17,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:18:17,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:17,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:17,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:17,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057960918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:17,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:17,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:17,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262830291] [2021-06-05 04:18:17,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:17,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:17,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:17,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:17,776 INFO L87 Difference]: Start difference. First operand 29306 states and 101497 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:18,165 INFO L93 Difference]: Finished difference Result 29939 states and 102947 transitions. [2021-06-05 04:18:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:18:18,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:18,222 INFO L225 Difference]: With dead ends: 29939 [2021-06-05 04:18:18,223 INFO L226 Difference]: Without dead ends: 29939 [2021-06-05 04:18:18,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:18:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29939 states. [2021-06-05 04:18:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29939 to 29574. [2021-06-05 04:18:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.4610286409900923) internal successors, (102353), 29573 states have internal predecessors, (102353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102353 transitions. [2021-06-05 04:18:18,748 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102353 transitions. Word has length 22 [2021-06-05 04:18:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:18,748 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102353 transitions. [2021-06-05 04:18:18,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102353 transitions. [2021-06-05 04:18:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:18,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:18,756 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:18,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21575,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:18,969 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1041146919, now seen corresponding path program 210 times [2021-06-05 04:18:18,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:18,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161531833] [2021-06-05 04:18:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:19,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:19,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161531833] [2021-06-05 04:18:19,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161531833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:19,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443630385] [2021-06-05 04:18:19,050 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 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 04:18:19,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:18:19,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:19,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:19,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443630385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:19,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:19,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:19,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364337913] [2021-06-05 04:18:19,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:19,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:19,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:19,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:19,122 INFO L87 Difference]: Start difference. First operand 29574 states and 102353 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:19,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:19,355 INFO L93 Difference]: Finished difference Result 29973 states and 103433 transitions. [2021-06-05 04:18:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:18:19,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:19,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:19,416 INFO L225 Difference]: With dead ends: 29973 [2021-06-05 04:18:19,416 INFO L226 Difference]: Without dead ends: 29965 [2021-06-05 04:18:19,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:18:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29965 states. [2021-06-05 04:18:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29965 to 29574. [2021-06-05 04:18:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.460994826361884) internal successors, (102352), 29573 states have internal predecessors, (102352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102352 transitions. [2021-06-05 04:18:19,930 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102352 transitions. Word has length 22 [2021-06-05 04:18:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:19,930 INFO L482 AbstractCegarLoop]: Abstraction has 29574 states and 102352 transitions. [2021-06-05 04:18:19,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102352 transitions. [2021-06-05 04:18:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:19,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:19,937 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:20,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21576 [2021-06-05 04:18:20,138 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1511790492, now seen corresponding path program 211 times [2021-06-05 04:18:20,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:20,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514511345] [2021-06-05 04:18:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:20,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:20,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514511345] [2021-06-05 04:18:20,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514511345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:20,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898803848] [2021-06-05 04:18:20,213 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 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 04:18:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:20,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:20,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898803848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:20,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:20,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:20,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076779727] [2021-06-05 04:18:20,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:20,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:20,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:20,280 INFO L87 Difference]: Start difference. First operand 29574 states and 102352 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:20,723 INFO L93 Difference]: Finished difference Result 30267 states and 103892 transitions. [2021-06-05 04:18:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:18:20,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:20,780 INFO L225 Difference]: With dead ends: 30267 [2021-06-05 04:18:20,780 INFO L226 Difference]: Without dead ends: 30267 [2021-06-05 04:18:20,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:18:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30267 states. [2021-06-05 04:18:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30267 to 29743. [2021-06-05 04:18:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29743 states, 29742 states have (on average 3.458879698742519) internal successors, (102874), 29742 states have internal predecessors, (102874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29743 states to 29743 states and 102874 transitions. [2021-06-05 04:18:21,294 INFO L78 Accepts]: Start accepts. Automaton has 29743 states and 102874 transitions. Word has length 22 [2021-06-05 04:18:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:21,294 INFO L482 AbstractCegarLoop]: Abstraction has 29743 states and 102874 transitions. [2021-06-05 04:18:21,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 29743 states and 102874 transitions. [2021-06-05 04:18:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:21,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:21,302 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:21,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21577,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:21,502 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:21,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:21,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2137915585, now seen corresponding path program 212 times [2021-06-05 04:18:21,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:21,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042814818] [2021-06-05 04:18:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:21,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042814818] [2021-06-05 04:18:21,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042814818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212838474] [2021-06-05 04:18:21,555 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 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 04:18:21,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:18:21,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:21,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:18:21,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212838474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:21,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:21,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:18:21,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518807992] [2021-06-05 04:18:21,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:18:21,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:18:21,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:18:21,625 INFO L87 Difference]: Start difference. First operand 29743 states and 102874 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:18:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:21,902 INFO L93 Difference]: Finished difference Result 30158 states and 103835 transitions. [2021-06-05 04:18:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:18:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-05 04:18:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:21,958 INFO L225 Difference]: With dead ends: 30158 [2021-06-05 04:18:21,958 INFO L226 Difference]: Without dead ends: 30158 [2021-06-05 04:18:21,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:18:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30158 states. [2021-06-05 04:18:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30158 to 29791. [2021-06-05 04:18:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29791 states, 29790 states have (on average 3.4585431352802956) internal successors, (103030), 29790 states have internal predecessors, (103030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29791 states to 29791 states and 103030 transitions. [2021-06-05 04:18:22,480 INFO L78 Accepts]: Start accepts. Automaton has 29791 states and 103030 transitions. Word has length 22 [2021-06-05 04:18:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:22,480 INFO L482 AbstractCegarLoop]: Abstraction has 29791 states and 103030 transitions. [2021-06-05 04:18:22,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:18:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 29791 states and 103030 transitions. [2021-06-05 04:18:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:22,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:22,487 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:22,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21578 [2021-06-05 04:18:22,688 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:22,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:22,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1379307466, now seen corresponding path program 213 times [2021-06-05 04:18:22,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:22,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096991570] [2021-06-05 04:18:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:22,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096991570] [2021-06-05 04:18:22,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096991570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101800326] [2021-06-05 04:18:22,742 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 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 04:18:22,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:18:22,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:22,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:22,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:18:22,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101800326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:22,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:22,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:18:22,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658954139] [2021-06-05 04:18:22,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:18:22,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:22,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:18:22,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:18:22,800 INFO L87 Difference]: Start difference. First operand 29791 states and 103030 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:18:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:23,091 INFO L93 Difference]: Finished difference Result 31233 states and 107516 transitions. [2021-06-05 04:18:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:18:23,092 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 22 [2021-06-05 04:18:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:23,158 INFO L225 Difference]: With dead ends: 31233 [2021-06-05 04:18:23,158 INFO L226 Difference]: Without dead ends: 31229 [2021-06-05 04:18:23,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:18:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31229 states. [2021-06-05 04:18:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31229 to 28496. [2021-06-05 04:18:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449131426566064) internal successors, (98283), 28495 states have internal predecessors, (98283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98283 transitions. [2021-06-05 04:18:23,732 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98283 transitions. Word has length 22 [2021-06-05 04:18:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:23,732 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98283 transitions. [2021-06-05 04:18:23,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 04:18:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98283 transitions. [2021-06-05 04:18:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:23,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:23,740 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:23,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21579,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:23,940 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2127159261, now seen corresponding path program 214 times [2021-06-05 04:18:23,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:23,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091672856] [2021-06-05 04:18:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:23,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:23,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091672856] [2021-06-05 04:18:23,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091672856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:23,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798220179] [2021-06-05 04:18:23,999 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 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 04:18:24,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:18:24,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:24,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798220179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:24,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:24,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:24,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240140642] [2021-06-05 04:18:24,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:24,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:24,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:24,054 INFO L87 Difference]: Start difference. First operand 28496 states and 98283 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:18:24,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:24,290 INFO L93 Difference]: Finished difference Result 28956 states and 99501 transitions. [2021-06-05 04:18:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:18:24,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:18:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:24,351 INFO L225 Difference]: With dead ends: 28956 [2021-06-05 04:18:24,352 INFO L226 Difference]: Without dead ends: 28951 [2021-06-05 04:18:24,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:18:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-06-05 04:18:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 28496. [2021-06-05 04:18:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449061238813827) internal successors, (98281), 28495 states have internal predecessors, (98281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98281 transitions. [2021-06-05 04:18:24,902 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98281 transitions. Word has length 22 [2021-06-05 04:18:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:24,902 INFO L482 AbstractCegarLoop]: Abstraction has 28496 states and 98281 transitions. [2021-06-05 04:18:24,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:18:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98281 transitions. [2021-06-05 04:18:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:24,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:24,910 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:25,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21580 [2021-06-05 04:18:25,111 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:25,111 INFO L82 PathProgramCache]: Analyzing trace with hash 365122954, now seen corresponding path program 215 times [2021-06-05 04:18:25,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:25,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372042224] [2021-06-05 04:18:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:25,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:25,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372042224] [2021-06-05 04:18:25,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372042224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:25,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90525810] [2021-06-05 04:18:25,168 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 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 04:18:25,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:18:25,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:25,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:25,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:25,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90525810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:25,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:25,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:25,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823361667] [2021-06-05 04:18:25,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:25,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:25,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:25,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:25,230 INFO L87 Difference]: Start difference. First operand 28496 states and 98281 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:18:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:25,523 INFO L93 Difference]: Finished difference Result 34766 states and 118378 transitions. [2021-06-05 04:18:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:18:25,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:18:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:25,598 INFO L225 Difference]: With dead ends: 34766 [2021-06-05 04:18:25,598 INFO L226 Difference]: Without dead ends: 34766 [2021-06-05 04:18:25,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:18:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34766 states. [2021-06-05 04:18:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34766 to 33433. [2021-06-05 04:18:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.4411043311797083) internal successors, (115043), 33432 states have internal predecessors, (115043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115043 transitions. [2021-06-05 04:18:26,238 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115043 transitions. Word has length 22 [2021-06-05 04:18:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:26,238 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115043 transitions. [2021-06-05 04:18:26,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:18:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115043 transitions. [2021-06-05 04:18:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:26,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:26,247 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:26,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21581 [2021-06-05 04:18:26,447 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:26,448 INFO L82 PathProgramCache]: Analyzing trace with hash 859702083, now seen corresponding path program 216 times [2021-06-05 04:18:26,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:26,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154066200] [2021-06-05 04:18:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:26,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:26,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154066200] [2021-06-05 04:18:26,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154066200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:26,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894047916] [2021-06-05 04:18:26,512 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 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 04:18:26,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:18:26,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:26,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:26,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894047916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:26,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:26,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:18:26,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584343252] [2021-06-05 04:18:26,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:26,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:26,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:26,571 INFO L87 Difference]: Start difference. First operand 33433 states and 115043 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:26,836 INFO L93 Difference]: Finished difference Result 33998 states and 116476 transitions. [2021-06-05 04:18:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:18:26,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:26,909 INFO L225 Difference]: With dead ends: 33998 [2021-06-05 04:18:26,909 INFO L226 Difference]: Without dead ends: 33993 [2021-06-05 04:18:26,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:18:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33993 states. [2021-06-05 04:18:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33993 to 33433. [2021-06-05 04:18:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.440984685331419) internal successors, (115039), 33432 states have internal predecessors, (115039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115039 transitions. [2021-06-05 04:18:27,511 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115039 transitions. Word has length 22 [2021-06-05 04:18:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:27,511 INFO L482 AbstractCegarLoop]: Abstraction has 33433 states and 115039 transitions. [2021-06-05 04:18:27,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115039 transitions. [2021-06-05 04:18:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:27,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:27,520 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:27,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21582,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:27,720 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash -902334224, now seen corresponding path program 217 times [2021-06-05 04:18:27,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:27,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639005419] [2021-06-05 04:18:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:27,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639005419] [2021-06-05 04:18:27,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639005419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378809954] [2021-06-05 04:18:27,780 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 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 04:18:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:27,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:27,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378809954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:27,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:27,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:18:27,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101493272] [2021-06-05 04:18:27,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:27,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:27,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:27,839 INFO L87 Difference]: Start difference. First operand 33433 states and 115039 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:28,126 INFO L93 Difference]: Finished difference Result 40272 states and 136673 transitions. [2021-06-05 04:18:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:18:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:28,205 INFO L225 Difference]: With dead ends: 40272 [2021-06-05 04:18:28,205 INFO L226 Difference]: Without dead ends: 40272 [2021-06-05 04:18:28,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:18:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40272 states. [2021-06-05 04:18:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40272 to 29596. [2021-06-05 04:18:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29596 states, 29595 states have (on average 3.431120121642169) internal successors, (101544), 29595 states have internal predecessors, (101544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29596 states to 29596 states and 101544 transitions. [2021-06-05 04:18:28,849 INFO L78 Accepts]: Start accepts. Automaton has 29596 states and 101544 transitions. Word has length 22 [2021-06-05 04:18:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:28,850 INFO L482 AbstractCegarLoop]: Abstraction has 29596 states and 101544 transitions. [2021-06-05 04:18:28,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 29596 states and 101544 transitions. [2021-06-05 04:18:28,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:28,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:28,858 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:29,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21583 [2021-06-05 04:18:29,058 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:29,059 INFO L82 PathProgramCache]: Analyzing trace with hash 416802943, now seen corresponding path program 218 times [2021-06-05 04:18:29,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:29,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218061619] [2021-06-05 04:18:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:29,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218061619] [2021-06-05 04:18:29,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218061619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593764186] [2021-06-05 04:18:29,125 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 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 04:18:29,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:18:29,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:29,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:29,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:29,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593764186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:29,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:29,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:18:29,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919237351] [2021-06-05 04:18:29,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:29,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:29,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:29,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:29,199 INFO L87 Difference]: Start difference. First operand 29596 states and 101544 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:29,476 INFO L93 Difference]: Finished difference Result 30323 states and 103506 transitions. [2021-06-05 04:18:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:18:29,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:29,531 INFO L225 Difference]: With dead ends: 30323 [2021-06-05 04:18:29,531 INFO L226 Difference]: Without dead ends: 30317 [2021-06-05 04:18:29,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:18:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30317 states. [2021-06-05 04:18:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30317 to 29652. [2021-06-05 04:18:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29652 states, 29651 states have (on average 3.4303058918754847) internal successors, (101712), 29651 states have internal predecessors, (101712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29652 states to 29652 states and 101712 transitions. [2021-06-05 04:18:30,043 INFO L78 Accepts]: Start accepts. Automaton has 29652 states and 101712 transitions. Word has length 22 [2021-06-05 04:18:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:30,043 INFO L482 AbstractCegarLoop]: Abstraction has 29652 states and 101712 transitions. [2021-06-05 04:18:30,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 29652 states and 101712 transitions. [2021-06-05 04:18:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:30,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:30,051 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:30,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21584 [2021-06-05 04:18:30,252 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:30,252 INFO L82 PathProgramCache]: Analyzing trace with hash 580800714, now seen corresponding path program 219 times [2021-06-05 04:18:30,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:30,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693961502] [2021-06-05 04:18:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:30,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:30,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693961502] [2021-06-05 04:18:30,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693961502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:30,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291575241] [2021-06-05 04:18:30,316 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 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 04:18:30,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:18:30,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:30,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:30,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:30,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291575241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:30,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:30,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:18:30,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085503959] [2021-06-05 04:18:30,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:30,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:30,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:30,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:30,376 INFO L87 Difference]: Start difference. First operand 29652 states and 101712 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:30,714 INFO L93 Difference]: Finished difference Result 34838 states and 118433 transitions. [2021-06-05 04:18:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:18:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:30,780 INFO L225 Difference]: With dead ends: 34838 [2021-06-05 04:18:30,780 INFO L226 Difference]: Without dead ends: 34838 [2021-06-05 04:18:30,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:18:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34838 states. [2021-06-05 04:18:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34838 to 33690. [2021-06-05 04:18:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4329603134554305) internal successors, (115653), 33689 states have internal predecessors, (115653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115653 transitions. [2021-06-05 04:18:31,363 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115653 transitions. Word has length 22 [2021-06-05 04:18:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:31,363 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115653 transitions. [2021-06-05 04:18:31,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115653 transitions. [2021-06-05 04:18:31,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:31,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:31,371 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:31,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21585,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:31,572 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:31,572 INFO L82 PathProgramCache]: Analyzing trace with hash 223235229, now seen corresponding path program 220 times [2021-06-05 04:18:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:31,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597372759] [2021-06-05 04:18:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:31,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:31,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597372759] [2021-06-05 04:18:31,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597372759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:31,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646828538] [2021-06-05 04:18:31,636 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 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 04:18:31,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:18:31,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:31,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:31,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:31,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646828538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:31,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:31,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:31,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491216247] [2021-06-05 04:18:31,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:31,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:31,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:31,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:31,698 INFO L87 Difference]: Start difference. First operand 33690 states and 115653 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:31,975 INFO L93 Difference]: Finished difference Result 34116 states and 116578 transitions. [2021-06-05 04:18:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:18:31,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:32,037 INFO L225 Difference]: With dead ends: 34116 [2021-06-05 04:18:32,037 INFO L226 Difference]: Without dead ends: 34111 [2021-06-05 04:18:32,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:18:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34111 states. [2021-06-05 04:18:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34111 to 33690. [2021-06-05 04:18:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4328712636172045) internal successors, (115650), 33689 states have internal predecessors, (115650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115650 transitions. [2021-06-05 04:18:32,628 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115650 transitions. Word has length 22 [2021-06-05 04:18:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:32,629 INFO L482 AbstractCegarLoop]: Abstraction has 33690 states and 115650 transitions. [2021-06-05 04:18:32,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:32,629 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115650 transitions. [2021-06-05 04:18:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:32,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:32,637 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:32,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21586 [2021-06-05 04:18:32,837 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:32,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1538801078, now seen corresponding path program 221 times [2021-06-05 04:18:32,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:32,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101499794] [2021-06-05 04:18:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:32,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:32,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101499794] [2021-06-05 04:18:32,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101499794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:32,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309657082] [2021-06-05 04:18:32,897 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 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 04:18:32,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:18:32,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:32,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:32,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309657082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:32,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:32,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:32,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199423413] [2021-06-05 04:18:32,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:32,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:32,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:32,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:32,964 INFO L87 Difference]: Start difference. First operand 33690 states and 115650 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:33,241 INFO L93 Difference]: Finished difference Result 36368 states and 123286 transitions. [2021-06-05 04:18:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:18:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:33,305 INFO L225 Difference]: With dead ends: 36368 [2021-06-05 04:18:33,305 INFO L226 Difference]: Without dead ends: 36368 [2021-06-05 04:18:33,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:18:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36368 states. [2021-06-05 04:18:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36368 to 27032. [2021-06-05 04:18:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27032 states, 27031 states have (on average 3.4189634123783805) internal successors, (92418), 27031 states have internal predecessors, (92418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27032 states to 27032 states and 92418 transitions. [2021-06-05 04:18:33,863 INFO L78 Accepts]: Start accepts. Automaton has 27032 states and 92418 transitions. Word has length 22 [2021-06-05 04:18:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:33,863 INFO L482 AbstractCegarLoop]: Abstraction has 27032 states and 92418 transitions. [2021-06-05 04:18:33,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 27032 states and 92418 transitions. [2021-06-05 04:18:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:33,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:33,871 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:34,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21587 [2021-06-05 04:18:34,085 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:34,085 INFO L82 PathProgramCache]: Analyzing trace with hash -219663911, now seen corresponding path program 222 times [2021-06-05 04:18:34,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:34,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655207471] [2021-06-05 04:18:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:34,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:34,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655207471] [2021-06-05 04:18:34,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655207471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:34,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864629214] [2021-06-05 04:18:34,151 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 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 04:18:34,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:18:34,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:34,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:34,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864629214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:34,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:34,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:34,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708705934] [2021-06-05 04:18:34,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:34,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:34,215 INFO L87 Difference]: Start difference. First operand 27032 states and 92418 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:34,516 INFO L93 Difference]: Finished difference Result 27914 states and 94767 transitions. [2021-06-05 04:18:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:18:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:34,570 INFO L225 Difference]: With dead ends: 27914 [2021-06-05 04:18:34,570 INFO L226 Difference]: Without dead ends: 27908 [2021-06-05 04:18:34,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=348, Invalid=708, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:18:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27908 states. [2021-06-05 04:18:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27908 to 27045. [2021-06-05 04:18:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27045 states, 27044 states have (on average 3.419168762017453) internal successors, (92468), 27044 states have internal predecessors, (92468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27045 states to 27045 states and 92468 transitions. [2021-06-05 04:18:35,042 INFO L78 Accepts]: Start accepts. Automaton has 27045 states and 92468 transitions. Word has length 22 [2021-06-05 04:18:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:35,042 INFO L482 AbstractCegarLoop]: Abstraction has 27045 states and 92468 transitions. [2021-06-05 04:18:35,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 27045 states and 92468 transitions. [2021-06-05 04:18:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:35,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:35,050 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:35,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21588 [2021-06-05 04:18:35,251 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:35,251 INFO L82 PathProgramCache]: Analyzing trace with hash -55666140, now seen corresponding path program 223 times [2021-06-05 04:18:35,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:35,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104350940] [2021-06-05 04:18:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:35,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:35,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104350940] [2021-06-05 04:18:35,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104350940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:35,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703143323] [2021-06-05 04:18:35,318 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 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 04:18:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:35,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:35,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:35,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703143323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:35,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:35,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:35,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884122399] [2021-06-05 04:18:35,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:35,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:35,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:35,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:35,391 INFO L87 Difference]: Start difference. First operand 27045 states and 92468 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:35,701 INFO L93 Difference]: Finished difference Result 32148 states and 108873 transitions. [2021-06-05 04:18:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:18:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:35,764 INFO L225 Difference]: With dead ends: 32148 [2021-06-05 04:18:35,764 INFO L226 Difference]: Without dead ends: 32148 [2021-06-05 04:18:35,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:18:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32148 states. [2021-06-05 04:18:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32148 to 25053. [2021-06-05 04:18:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25053 states, 25052 states have (on average 3.419726967906754) internal successors, (85671), 25052 states have internal predecessors, (85671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25053 states to 25053 states and 85671 transitions. [2021-06-05 04:18:36,266 INFO L78 Accepts]: Start accepts. Automaton has 25053 states and 85671 transitions. Word has length 22 [2021-06-05 04:18:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:36,266 INFO L482 AbstractCegarLoop]: Abstraction has 25053 states and 85671 transitions. [2021-06-05 04:18:36,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 25053 states and 85671 transitions. [2021-06-05 04:18:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:36,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:36,274 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:36,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21589 [2021-06-05 04:18:36,475 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:36,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1064635363, now seen corresponding path program 224 times [2021-06-05 04:18:36,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:36,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583088856] [2021-06-05 04:18:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:36,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583088856] [2021-06-05 04:18:36,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583088856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444708239] [2021-06-05 04:18:36,549 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 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 04:18:36,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:18:36,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:36,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:36,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444708239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:36,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:36,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:36,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128412280] [2021-06-05 04:18:36,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:36,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:36,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:36,613 INFO L87 Difference]: Start difference. First operand 25053 states and 85671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:36,922 INFO L93 Difference]: Finished difference Result 25874 states and 87890 transitions. [2021-06-05 04:18:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:18:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:36,972 INFO L225 Difference]: With dead ends: 25874 [2021-06-05 04:18:36,973 INFO L226 Difference]: Without dead ends: 25867 [2021-06-05 04:18:36,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:18:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25867 states. [2021-06-05 04:18:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25867 to 25080. [2021-06-05 04:18:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25080 states, 25079 states have (on average 3.419474460704175) internal successors, (85757), 25079 states have internal predecessors, (85757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 85757 transitions. [2021-06-05 04:18:37,441 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 85757 transitions. Word has length 22 [2021-06-05 04:18:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:37,442 INFO L482 AbstractCegarLoop]: Abstraction has 25080 states and 85757 transitions. [2021-06-05 04:18:37,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:37,442 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 85757 transitions. [2021-06-05 04:18:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:37,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:37,449 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:37,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21590 [2021-06-05 04:18:37,650 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:37,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1323123318, now seen corresponding path program 225 times [2021-06-05 04:18:37,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:37,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863760161] [2021-06-05 04:18:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:37,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:37,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863760161] [2021-06-05 04:18:37,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863760161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:37,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572791084] [2021-06-05 04:18:37,716 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 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 04:18:37,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:18:37,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:37,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:37,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:37,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572791084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:37,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:37,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:37,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683156549] [2021-06-05 04:18:37,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:37,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:37,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:37,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:37,783 INFO L87 Difference]: Start difference. First operand 25080 states and 85757 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:38,169 INFO L93 Difference]: Finished difference Result 27927 states and 94333 transitions. [2021-06-05 04:18:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:18:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:38,228 INFO L225 Difference]: With dead ends: 27927 [2021-06-05 04:18:38,229 INFO L226 Difference]: Without dead ends: 27927 [2021-06-05 04:18:38,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=642, Invalid=1250, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:18:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27927 states. [2021-06-05 04:18:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27927 to 25274. [2021-06-05 04:18:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25274 states, 25273 states have (on average 3.42104221896886) internal successors, (86460), 25273 states have internal predecessors, (86460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25274 states to 25274 states and 86460 transitions. [2021-06-05 04:18:38,687 INFO L78 Accepts]: Start accepts. Automaton has 25274 states and 86460 transitions. Word has length 22 [2021-06-05 04:18:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:38,687 INFO L482 AbstractCegarLoop]: Abstraction has 25274 states and 86460 transitions. [2021-06-05 04:18:38,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:38,687 INFO L276 IsEmpty]: Start isEmpty. Operand 25274 states and 86460 transitions. [2021-06-05 04:18:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:38,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:38,695 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:38,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21591,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:38,896 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:38,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1967599235, now seen corresponding path program 226 times [2021-06-05 04:18:38,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:38,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101650021] [2021-06-05 04:18:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:38,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:38,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101650021] [2021-06-05 04:18:38,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101650021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:38,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112221628] [2021-06-05 04:18:38,961 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 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 04:18:38,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:18:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:38,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:38,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:39,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112221628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:39,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:39,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:39,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640550188] [2021-06-05 04:18:39,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:39,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:39,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:39,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:39,026 INFO L87 Difference]: Start difference. First operand 25274 states and 86460 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:39,332 INFO L93 Difference]: Finished difference Result 27147 states and 92076 transitions. [2021-06-05 04:18:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:18:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:39,379 INFO L225 Difference]: With dead ends: 27147 [2021-06-05 04:18:39,379 INFO L226 Difference]: Without dead ends: 27142 [2021-06-05 04:18:39,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:18:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27142 states. [2021-06-05 04:18:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27142 to 25361. [2021-06-05 04:18:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25361 states, 25360 states have (on average 3.4214511041009463) internal successors, (86768), 25360 states have internal predecessors, (86768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25361 states to 25361 states and 86768 transitions. [2021-06-05 04:18:39,826 INFO L78 Accepts]: Start accepts. Automaton has 25361 states and 86768 transitions. Word has length 22 [2021-06-05 04:18:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:39,826 INFO L482 AbstractCegarLoop]: Abstraction has 25361 states and 86768 transitions. [2021-06-05 04:18:39,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 25361 states and 86768 transitions. [2021-06-05 04:18:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:39,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:39,834 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:40,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21592,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:40,034 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:40,034 INFO L82 PathProgramCache]: Analyzing trace with hash 205562928, now seen corresponding path program 227 times [2021-06-05 04:18:40,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:40,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032630522] [2021-06-05 04:18:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:40,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:40,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032630522] [2021-06-05 04:18:40,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032630522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:40,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683024832] [2021-06-05 04:18:40,095 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 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 04:18:40,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:18:40,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:40,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:40,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683024832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:40,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:40,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:40,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264613941] [2021-06-05 04:18:40,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:40,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:40,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:40,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:40,161 INFO L87 Difference]: Start difference. First operand 25361 states and 86768 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:40,379 INFO L93 Difference]: Finished difference Result 27451 states and 92974 transitions. [2021-06-05 04:18:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:18:40,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:40,428 INFO L225 Difference]: With dead ends: 27451 [2021-06-05 04:18:40,428 INFO L226 Difference]: Without dead ends: 27451 [2021-06-05 04:18:40,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:18:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27451 states. [2021-06-05 04:18:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27451 to 24554. [2021-06-05 04:18:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.42544699222091) internal successors, (84105), 24553 states have internal predecessors, (84105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84105 transitions. [2021-06-05 04:18:40,846 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84105 transitions. Word has length 22 [2021-06-05 04:18:40,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:40,846 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84105 transitions. [2021-06-05 04:18:40,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84105 transitions. [2021-06-05 04:18:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:40,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:40,853 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:41,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21593,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:41,054 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1524700095, now seen corresponding path program 228 times [2021-06-05 04:18:41,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:41,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419857126] [2021-06-05 04:18:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:41,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:41,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419857126] [2021-06-05 04:18:41,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419857126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:41,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937853374] [2021-06-05 04:18:41,121 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 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 04:18:41,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:18:41,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:41,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:41,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:41,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937853374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:41,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:41,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:41,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380929422] [2021-06-05 04:18:41,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:41,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:41,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:41,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:41,184 INFO L87 Difference]: Start difference. First operand 24554 states and 84105 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:41,398 INFO L93 Difference]: Finished difference Result 25024 states and 85353 transitions. [2021-06-05 04:18:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:18:41,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:41,443 INFO L225 Difference]: With dead ends: 25024 [2021-06-05 04:18:41,444 INFO L226 Difference]: Without dead ends: 25018 [2021-06-05 04:18:41,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:18:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25018 states. [2021-06-05 04:18:41,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25018 to 24554. [2021-06-05 04:18:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.4254062640003258) internal successors, (84104), 24553 states have internal predecessors, (84104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84104 transitions. [2021-06-05 04:18:41,819 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84104 transitions. Word has length 22 [2021-06-05 04:18:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:41,819 INFO L482 AbstractCegarLoop]: Abstraction has 24554 states and 84104 transitions. [2021-06-05 04:18:41,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84104 transitions. [2021-06-05 04:18:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:41,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:41,827 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:42,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21594 [2021-06-05 04:18:42,027 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:42,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1688697866, now seen corresponding path program 229 times [2021-06-05 04:18:42,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:42,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346858065] [2021-06-05 04:18:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:42,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:42,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346858065] [2021-06-05 04:18:42,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346858065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:42,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243217055] [2021-06-05 04:18:42,090 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 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 04:18:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:42,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:42,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243217055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:42,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:42,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:42,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629522784] [2021-06-05 04:18:42,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:42,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:42,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:42,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:42,154 INFO L87 Difference]: Start difference. First operand 24554 states and 84104 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:42,378 INFO L93 Difference]: Finished difference Result 25874 states and 87934 transitions. [2021-06-05 04:18:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:18:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:42,429 INFO L225 Difference]: With dead ends: 25874 [2021-06-05 04:18:42,430 INFO L226 Difference]: Without dead ends: 25874 [2021-06-05 04:18:42,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:18:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2021-06-05 04:18:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 24995. [2021-06-05 04:18:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.425342082099704) internal successors, (85613), 24994 states have internal predecessors, (85613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85613 transitions. [2021-06-05 04:18:42,869 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85613 transitions. Word has length 22 [2021-06-05 04:18:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:42,869 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85613 transitions. [2021-06-05 04:18:42,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85613 transitions. [2021-06-05 04:18:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:42,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:42,877 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:43,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21595 [2021-06-05 04:18:43,077 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:43,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:43,077 INFO L82 PathProgramCache]: Analyzing trace with hash 679728643, now seen corresponding path program 230 times [2021-06-05 04:18:43,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:43,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026885844] [2021-06-05 04:18:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:43,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026885844] [2021-06-05 04:18:43,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026885844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611162357] [2021-06-05 04:18:43,147 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 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 04:18:43,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:18:43,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:43,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:43,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:43,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611162357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:43,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:43,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:43,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848257948] [2021-06-05 04:18:43,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:43,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:43,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:43,209 INFO L87 Difference]: Start difference. First operand 24995 states and 85613 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:43,417 INFO L93 Difference]: Finished difference Result 25438 states and 86795 transitions. [2021-06-05 04:18:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:18:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:43,465 INFO L225 Difference]: With dead ends: 25438 [2021-06-05 04:18:43,465 INFO L226 Difference]: Without dead ends: 25431 [2021-06-05 04:18:43,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:18:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25431 states. [2021-06-05 04:18:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25431 to 24995. [2021-06-05 04:18:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.4253020724973995) internal successors, (85612), 24994 states have internal predecessors, (85612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85612 transitions. [2021-06-05 04:18:43,879 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85612 transitions. Word has length 22 [2021-06-05 04:18:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:43,879 INFO L482 AbstractCegarLoop]: Abstraction has 24995 states and 85612 transitions. [2021-06-05 04:18:43,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85612 transitions. [2021-06-05 04:18:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:43,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:43,887 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:44,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21596 [2021-06-05 04:18:44,087 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:44,088 INFO L82 PathProgramCache]: Analyzing trace with hash 421240688, now seen corresponding path program 231 times [2021-06-05 04:18:44,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:44,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479518746] [2021-06-05 04:18:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:44,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:44,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479518746] [2021-06-05 04:18:44,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479518746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:44,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745908818] [2021-06-05 04:18:44,153 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 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 04:18:44,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:18:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:44,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:44,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745908818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:44,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:44,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331834442] [2021-06-05 04:18:44,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:44,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:44,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:44,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:44,223 INFO L87 Difference]: Start difference. First operand 24995 states and 85612 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:44,573 INFO L93 Difference]: Finished difference Result 25599 states and 86951 transitions. [2021-06-05 04:18:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:18:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:44,619 INFO L225 Difference]: With dead ends: 25599 [2021-06-05 04:18:44,619 INFO L226 Difference]: Without dead ends: 25599 [2021-06-05 04:18:44,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:18:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-05 04:18:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 25031. [2021-06-05 04:18:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.4251298441869755) internal successors, (85731), 25030 states have internal predecessors, (85731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85731 transitions. [2021-06-05 04:18:45,057 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85731 transitions. Word has length 22 [2021-06-05 04:18:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:45,057 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85731 transitions. [2021-06-05 04:18:45,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85731 transitions. [2021-06-05 04:18:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:45,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:45,065 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:45,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21597 [2021-06-05 04:18:45,265 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:45,265 INFO L82 PathProgramCache]: Analyzing trace with hash 255417407, now seen corresponding path program 232 times [2021-06-05 04:18:45,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:45,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120988049] [2021-06-05 04:18:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:45,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:45,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120988049] [2021-06-05 04:18:45,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120988049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:45,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861018133] [2021-06-05 04:18:45,341 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 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 04:18:45,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:18:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:45,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861018133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:45,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:45,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:45,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235789041] [2021-06-05 04:18:45,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:45,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:45,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:45,407 INFO L87 Difference]: Start difference. First operand 25031 states and 85731 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:45,624 INFO L93 Difference]: Finished difference Result 25442 states and 86842 transitions. [2021-06-05 04:18:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:18:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:45,673 INFO L225 Difference]: With dead ends: 25442 [2021-06-05 04:18:45,673 INFO L226 Difference]: Without dead ends: 25434 [2021-06-05 04:18:45,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:18:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2021-06-05 04:18:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 25031. [2021-06-05 04:18:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.425089892129445) internal successors, (85730), 25030 states have internal predecessors, (85730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85730 transitions. [2021-06-05 04:18:46,100 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85730 transitions. Word has length 22 [2021-06-05 04:18:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:46,101 INFO L482 AbstractCegarLoop]: Abstraction has 25031 states and 85730 transitions. [2021-06-05 04:18:46,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85730 transitions. [2021-06-05 04:18:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:46,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:46,108 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:46,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21598 [2021-06-05 04:18:46,309 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash -215226166, now seen corresponding path program 233 times [2021-06-05 04:18:46,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:46,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062920079] [2021-06-05 04:18:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:46,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:46,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062920079] [2021-06-05 04:18:46,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062920079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:46,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334856834] [2021-06-05 04:18:46,387 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 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 04:18:46,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:18:46,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:46,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:46,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:46,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334856834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:46,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:46,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:46,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780757484] [2021-06-05 04:18:46,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:46,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:46,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:46,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:46,462 INFO L87 Difference]: Start difference. First operand 25031 states and 85730 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:46,886 INFO L93 Difference]: Finished difference Result 25692 states and 87163 transitions. [2021-06-05 04:18:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:18:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:46,932 INFO L225 Difference]: With dead ends: 25692 [2021-06-05 04:18:46,932 INFO L226 Difference]: Without dead ends: 25692 [2021-06-05 04:18:46,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:18:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25692 states. [2021-06-05 04:18:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25692 to 25022. [2021-06-05 04:18:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25022 states, 25021 states have (on average 3.4252427960513168) internal successors, (85703), 25021 states have internal predecessors, (85703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25022 states to 25022 states and 85703 transitions. [2021-06-05 04:18:47,347 INFO L78 Accepts]: Start accepts. Automaton has 25022 states and 85703 transitions. Word has length 22 [2021-06-05 04:18:47,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:47,347 INFO L482 AbstractCegarLoop]: Abstraction has 25022 states and 85703 transitions. [2021-06-05 04:18:47,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 25022 states and 85703 transitions. [2021-06-05 04:18:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:47,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:47,354 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:47,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21599 [2021-06-05 04:18:47,556 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:47,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:47,556 INFO L82 PathProgramCache]: Analyzing trace with hash -457840953, now seen corresponding path program 234 times [2021-06-05 04:18:47,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:47,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55206016] [2021-06-05 04:18:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:47,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:47,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55206016] [2021-06-05 04:18:47,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55206016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:47,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120533687] [2021-06-05 04:18:47,614 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 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 04:18:47,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:18:47,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:47,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:47,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:47,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120533687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:47,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:47,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:47,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652388624] [2021-06-05 04:18:47,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:47,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:47,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:47,677 INFO L87 Difference]: Start difference. First operand 25022 states and 85703 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:47,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:47,839 INFO L93 Difference]: Finished difference Result 25353 states and 86224 transitions. [2021-06-05 04:18:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:18:47,839 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:18:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:47,887 INFO L225 Difference]: With dead ends: 25353 [2021-06-05 04:18:47,887 INFO L226 Difference]: Without dead ends: 25353 [2021-06-05 04:18:47,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=119, Invalid=153, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25353 states. [2021-06-05 04:18:48,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25353 to 25033. [2021-06-05 04:18:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.4251757750079896) internal successors, (85739), 25032 states have internal predecessors, (85739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 85739 transitions. [2021-06-05 04:18:48,334 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 85739 transitions. Word has length 22 [2021-06-05 04:18:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:48,334 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 85739 transitions. [2021-06-05 04:18:48,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 85739 transitions. [2021-06-05 04:18:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:48,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:48,342 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:48,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21600,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:48,543 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash 625449180, now seen corresponding path program 235 times [2021-06-05 04:18:48,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:48,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935502512] [2021-06-05 04:18:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:48,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:48,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935502512] [2021-06-05 04:18:48,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935502512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:48,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984476838] [2021-06-05 04:18:48,598 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 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 04:18:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:48,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:48,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:48,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984476838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:48,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:48,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:48,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634640743] [2021-06-05 04:18:48,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:48,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:48,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:48,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:48,654 INFO L87 Difference]: Start difference. First operand 25033 states and 85739 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:48,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:48,881 INFO L93 Difference]: Finished difference Result 25371 states and 86392 transitions. [2021-06-05 04:18:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:18:48,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:18:48,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:48,928 INFO L225 Difference]: With dead ends: 25371 [2021-06-05 04:18:48,928 INFO L226 Difference]: Without dead ends: 25367 [2021-06-05 04:18:48,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:18:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25367 states. [2021-06-05 04:18:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25367 to 25136. [2021-06-05 04:18:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.4247065844440026) internal successors, (86080), 25135 states have internal predecessors, (86080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86080 transitions. [2021-06-05 04:18:49,361 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86080 transitions. Word has length 22 [2021-06-05 04:18:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:49,362 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86080 transitions. [2021-06-05 04:18:49,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:49,362 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86080 transitions. [2021-06-05 04:18:49,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:49,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:49,369 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:49,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21601 [2021-06-05 04:18:49,570 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:49,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1282251357, now seen corresponding path program 236 times [2021-06-05 04:18:49,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:49,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518960673] [2021-06-05 04:18:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:49,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:49,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518960673] [2021-06-05 04:18:49,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518960673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:49,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728513727] [2021-06-05 04:18:49,628 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 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 04:18:49,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:18:49,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:49,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:49,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:49,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728513727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:49,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:49,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:49,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173860225] [2021-06-05 04:18:49,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:49,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:49,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:49,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:49,683 INFO L87 Difference]: Start difference. First operand 25136 states and 86080 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:49,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:49,921 INFO L93 Difference]: Finished difference Result 25448 states and 86549 transitions. [2021-06-05 04:18:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:18:49,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:18:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:49,970 INFO L225 Difference]: With dead ends: 25448 [2021-06-05 04:18:49,970 INFO L226 Difference]: Without dead ends: 25447 [2021-06-05 04:18:49,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:18:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25447 states. [2021-06-05 04:18:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25447 to 25136. [2021-06-05 04:18:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.424070021881838) internal successors, (86064), 25135 states have internal predecessors, (86064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86064 transitions. [2021-06-05 04:18:50,407 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86064 transitions. Word has length 22 [2021-06-05 04:18:50,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:50,407 INFO L482 AbstractCegarLoop]: Abstraction has 25136 states and 86064 transitions. [2021-06-05 04:18:50,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86064 transitions. [2021-06-05 04:18:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:50,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:50,414 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:50,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21602,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:50,615 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:50,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2090297206, now seen corresponding path program 237 times [2021-06-05 04:18:50,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:50,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547167740] [2021-06-05 04:18:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:50,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:50,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547167740] [2021-06-05 04:18:50,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547167740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:50,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494485040] [2021-06-05 04:18:50,689 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 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 04:18:50,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:18:50,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:50,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:50,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:50,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494485040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:50,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:50,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:18:50,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302410530] [2021-06-05 04:18:50,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:18:50,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:18:50,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:18:50,749 INFO L87 Difference]: Start difference. First operand 25136 states and 86064 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:50,904 INFO L93 Difference]: Finished difference Result 25635 states and 87128 transitions. [2021-06-05 04:18:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:18:50,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:18:50,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:50,952 INFO L225 Difference]: With dead ends: 25635 [2021-06-05 04:18:50,952 INFO L226 Difference]: Without dead ends: 25635 [2021-06-05 04:18:50,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:18:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25635 states. [2021-06-05 04:18:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25635 to 25162. [2021-06-05 04:18:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4235920670879536) internal successors, (86141), 25161 states have internal predecessors, (86141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:51,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86141 transitions. [2021-06-05 04:18:51,391 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86141 transitions. Word has length 22 [2021-06-05 04:18:51,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:51,391 INFO L482 AbstractCegarLoop]: Abstraction has 25162 states and 86141 transitions. [2021-06-05 04:18:51,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:18:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86141 transitions. [2021-06-05 04:18:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:51,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:51,399 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:51,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21603,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:51,599 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:51,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1302102631, now seen corresponding path program 238 times [2021-06-05 04:18:51,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:51,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670408069] [2021-06-05 04:18:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:51,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:51,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670408069] [2021-06-05 04:18:51,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670408069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:51,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587471244] [2021-06-05 04:18:51,658 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 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 04:18:51,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:18:51,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:51,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:51,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:51,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587471244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:51,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:51,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:51,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857588747] [2021-06-05 04:18:51,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:51,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:51,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:51,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:51,723 INFO L87 Difference]: Start difference. First operand 25162 states and 86141 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:51,982 INFO L93 Difference]: Finished difference Result 25479 states and 86617 transitions. [2021-06-05 04:18:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:18:51,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:52,032 INFO L225 Difference]: With dead ends: 25479 [2021-06-05 04:18:52,032 INFO L226 Difference]: Without dead ends: 25477 [2021-06-05 04:18:52,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:18:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25477 states. [2021-06-05 04:18:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25477 to 25162. [2021-06-05 04:18:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4234728349429675) internal successors, (86138), 25161 states have internal predecessors, (86138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86138 transitions. [2021-06-05 04:18:52,510 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86138 transitions. Word has length 22 [2021-06-05 04:18:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:52,510 INFO L482 AbstractCegarLoop]: Abstraction has 25162 states and 86138 transitions. [2021-06-05 04:18:52,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86138 transitions. [2021-06-05 04:18:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:52,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:52,518 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:52,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21604,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:52,718 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:52,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash 475622756, now seen corresponding path program 239 times [2021-06-05 04:18:52,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:52,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320186714] [2021-06-05 04:18:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:52,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320186714] [2021-06-05 04:18:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320186714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150296026] [2021-06-05 04:18:52,773 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 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 04:18:52,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:18:52,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:52,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:52,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150296026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:52,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:52,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:52,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114109355] [2021-06-05 04:18:52,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:52,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:52,846 INFO L87 Difference]: Start difference. First operand 25162 states and 86138 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:53,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:53,030 INFO L93 Difference]: Finished difference Result 25812 states and 87617 transitions. [2021-06-05 04:18:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:18:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:53,080 INFO L225 Difference]: With dead ends: 25812 [2021-06-05 04:18:53,081 INFO L226 Difference]: Without dead ends: 25812 [2021-06-05 04:18:53,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:18:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25812 states. [2021-06-05 04:18:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25812 to 25201. [2021-06-05 04:18:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25201 states, 25200 states have (on average 3.4220634920634923) internal successors, (86236), 25200 states have internal predecessors, (86236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25201 states to 25201 states and 86236 transitions. [2021-06-05 04:18:53,511 INFO L78 Accepts]: Start accepts. Automaton has 25201 states and 86236 transitions. Word has length 22 [2021-06-05 04:18:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:53,511 INFO L482 AbstractCegarLoop]: Abstraction has 25201 states and 86236 transitions. [2021-06-05 04:18:53,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 25201 states and 86236 transitions. [2021-06-05 04:18:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:53,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:53,519 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:53,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21605,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:53,719 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:53,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:53,719 INFO L82 PathProgramCache]: Analyzing trace with hash 187302365, now seen corresponding path program 240 times [2021-06-05 04:18:53,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:53,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706671206] [2021-06-05 04:18:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:53,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:53,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706671206] [2021-06-05 04:18:53,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706671206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:53,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680211277] [2021-06-05 04:18:53,779 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 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 04:18:53,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:18:53,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:53,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680211277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:53,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:53,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:53,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798483180] [2021-06-05 04:18:53,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:53,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:53,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:53,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:53,842 INFO L87 Difference]: Start difference. First operand 25201 states and 86236 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:54,078 INFO L93 Difference]: Finished difference Result 30537 states and 103865 transitions. [2021-06-05 04:18:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:18:54,079 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:54,137 INFO L225 Difference]: With dead ends: 30537 [2021-06-05 04:18:54,137 INFO L226 Difference]: Without dead ends: 30534 [2021-06-05 04:18:54,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:18:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-06-05 04:18:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 25737. [2021-06-05 04:18:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25737 states, 25736 states have (on average 3.426173453528132) internal successors, (88176), 25736 states have internal predecessors, (88176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25737 states to 25737 states and 88176 transitions. [2021-06-05 04:18:54,626 INFO L78 Accepts]: Start accepts. Automaton has 25737 states and 88176 transitions. Word has length 22 [2021-06-05 04:18:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:54,626 INFO L482 AbstractCegarLoop]: Abstraction has 25737 states and 88176 transitions. [2021-06-05 04:18:54,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 25737 states and 88176 transitions. [2021-06-05 04:18:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:54,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:54,634 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:54,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21606,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:54,834 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:54,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:54,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1585237046, now seen corresponding path program 241 times [2021-06-05 04:18:54,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:54,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779978040] [2021-06-05 04:18:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:54,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:54,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779978040] [2021-06-05 04:18:54,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779978040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:54,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371578336] [2021-06-05 04:18:54,891 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 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 04:18:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:54,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:54,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:54,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371578336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:54,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:54,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:54,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150354660] [2021-06-05 04:18:54,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:54,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:54,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:54,956 INFO L87 Difference]: Start difference. First operand 25737 states and 88176 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:55,150 INFO L93 Difference]: Finished difference Result 32821 states and 111446 transitions. [2021-06-05 04:18:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:18:55,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:55,213 INFO L225 Difference]: With dead ends: 32821 [2021-06-05 04:18:55,213 INFO L226 Difference]: Without dead ends: 32821 [2021-06-05 04:18:55,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:18:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32821 states. [2021-06-05 04:18:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32821 to 31903. [2021-06-05 04:18:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31903 states, 31902 states have (on average 3.4264622907654694) internal successors, (109311), 31902 states have internal predecessors, (109311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31903 states to 31903 states and 109311 transitions. [2021-06-05 04:18:55,782 INFO L78 Accepts]: Start accepts. Automaton has 31903 states and 109311 transitions. Word has length 22 [2021-06-05 04:18:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:55,782 INFO L482 AbstractCegarLoop]: Abstraction has 31903 states and 109311 transitions. [2021-06-05 04:18:55,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 31903 states and 109311 transitions. [2021-06-05 04:18:55,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:55,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:55,790 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:55,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21607 [2021-06-05 04:18:55,990 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:55,990 INFO L82 PathProgramCache]: Analyzing trace with hash -885783015, now seen corresponding path program 242 times [2021-06-05 04:18:55,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:55,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092523875] [2021-06-05 04:18:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:56,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:56,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092523875] [2021-06-05 04:18:56,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092523875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:56,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098210036] [2021-06-05 04:18:56,053 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 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 04:18:56,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:18:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:56,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:56,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098210036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:56,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:56,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:56,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974953541] [2021-06-05 04:18:56,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:56,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:56,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:56,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:56,117 INFO L87 Difference]: Start difference. First operand 31903 states and 109311 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:56,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:56,373 INFO L93 Difference]: Finished difference Result 35145 states and 119531 transitions. [2021-06-05 04:18:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:18:56,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:56,449 INFO L225 Difference]: With dead ends: 35145 [2021-06-05 04:18:56,449 INFO L226 Difference]: Without dead ends: 35141 [2021-06-05 04:18:56,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:18:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35141 states. [2021-06-05 04:18:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35141 to 31927. [2021-06-05 04:18:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31927 states, 31926 states have (on average 3.426423604585604) internal successors, (109392), 31926 states have internal predecessors, (109392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31927 states to 31927 states and 109392 transitions. [2021-06-05 04:18:57,116 INFO L78 Accepts]: Start accepts. Automaton has 31927 states and 109392 transitions. Word has length 22 [2021-06-05 04:18:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:57,116 INFO L482 AbstractCegarLoop]: Abstraction has 31927 states and 109392 transitions. [2021-06-05 04:18:57,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 31927 states and 109392 transitions. [2021-06-05 04:18:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:57,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:57,124 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:57,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21608,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:57,325 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1047381468, now seen corresponding path program 243 times [2021-06-05 04:18:57,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:57,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134141720] [2021-06-05 04:18:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:57,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:57,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134141720] [2021-06-05 04:18:57,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134141720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:57,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744253448] [2021-06-05 04:18:57,383 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 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 04:18:57,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:18:57,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:57,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:57,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:18:57,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744253448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:57,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:57,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:18:57,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071143357] [2021-06-05 04:18:57,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:18:57,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:18:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:18:57,452 INFO L87 Difference]: Start difference. First operand 31927 states and 109392 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:57,627 INFO L93 Difference]: Finished difference Result 34058 states and 115874 transitions. [2021-06-05 04:18:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:18:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:18:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:57,690 INFO L225 Difference]: With dead ends: 34058 [2021-06-05 04:18:57,690 INFO L226 Difference]: Without dead ends: 34058 [2021-06-05 04:18:57,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:18:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34058 states. [2021-06-05 04:18:58,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34058 to 33786. [2021-06-05 04:18:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33786 states, 33785 states have (on average 3.4163978096788514) internal successors, (115423), 33785 states have internal predecessors, (115423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33786 states to 33786 states and 115423 transitions. [2021-06-05 04:18:58,237 INFO L78 Accepts]: Start accepts. Automaton has 33786 states and 115423 transitions. Word has length 22 [2021-06-05 04:18:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:58,237 INFO L482 AbstractCegarLoop]: Abstraction has 33786 states and 115423 transitions. [2021-06-05 04:18:58,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:18:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 33786 states and 115423 transitions. [2021-06-05 04:18:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:58,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:58,245 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:58,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21609 [2021-06-05 04:18:58,446 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash 208308573, now seen corresponding path program 244 times [2021-06-05 04:18:58,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:58,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935788795] [2021-06-05 04:18:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:58,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:58,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935788795] [2021-06-05 04:18:58,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935788795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:58,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789566018] [2021-06-05 04:18:58,514 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 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 04:18:58,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:18:58,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:58,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:58,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:58,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789566018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:58,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:58,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:58,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155459093] [2021-06-05 04:18:58,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:58,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:58,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:58,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:58,575 INFO L87 Difference]: Start difference. First operand 33786 states and 115423 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:18:58,842 INFO L93 Difference]: Finished difference Result 36935 states and 125285 transitions. [2021-06-05 04:18:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:18:58,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:18:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:18:58,916 INFO L225 Difference]: With dead ends: 36935 [2021-06-05 04:18:58,916 INFO L226 Difference]: Without dead ends: 36930 [2021-06-05 04:18:58,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:18:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36930 states. [2021-06-05 04:18:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36930 to 34131. [2021-06-05 04:18:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34131 states, 34130 states have (on average 3.4184295341341926) internal successors, (116671), 34130 states have internal predecessors, (116671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:18:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34131 states to 34131 states and 116671 transitions. [2021-06-05 04:18:59,574 INFO L78 Accepts]: Start accepts. Automaton has 34131 states and 116671 transitions. Word has length 22 [2021-06-05 04:18:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:18:59,574 INFO L482 AbstractCegarLoop]: Abstraction has 34131 states and 116671 transitions. [2021-06-05 04:18:59,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:18:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 34131 states and 116671 transitions. [2021-06-05 04:18:59,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:18:59,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:18:59,583 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:18:59,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21610,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:18:59,783 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:18:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:18:59,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1553727734, now seen corresponding path program 245 times [2021-06-05 04:18:59,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:18:59,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874135768] [2021-06-05 04:18:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:18:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:18:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:59,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:18:59,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874135768] [2021-06-05 04:18:59,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874135768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:59,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112452104] [2021-06-05 04:18:59,847 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 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 04:18:59,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:18:59,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:18:59,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:18:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:18:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:18:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112452104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:18:59,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:18:59,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:18:59,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360463156] [2021-06-05 04:18:59,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:18:59,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:18:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:18:59,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:18:59,912 INFO L87 Difference]: Start difference. First operand 34131 states and 116671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:00,132 INFO L93 Difference]: Finished difference Result 34565 states and 117528 transitions. [2021-06-05 04:19:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:19:00,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:00,198 INFO L225 Difference]: With dead ends: 34565 [2021-06-05 04:19:00,198 INFO L226 Difference]: Without dead ends: 34565 [2021-06-05 04:19:00,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:19:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34565 states. [2021-06-05 04:19:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34565 to 34136. [2021-06-05 04:19:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178995166251647) internal successors, (116670), 34135 states have internal predecessors, (116670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116670 transitions. [2021-06-05 04:19:00,778 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116670 transitions. Word has length 22 [2021-06-05 04:19:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:00,778 INFO L482 AbstractCegarLoop]: Abstraction has 34136 states and 116670 transitions. [2021-06-05 04:19:00,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116670 transitions. [2021-06-05 04:19:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:00,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:00,786 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:00,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21611 [2021-06-05 04:19:00,987 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:00,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:00,987 INFO L82 PathProgramCache]: Analyzing trace with hash -234590567, now seen corresponding path program 246 times [2021-06-05 04:19:00,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:00,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959964429] [2021-06-05 04:19:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:01,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:01,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959964429] [2021-06-05 04:19:01,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959964429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:01,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269047690] [2021-06-05 04:19:01,055 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 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 04:19:01,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:19:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:01,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269047690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:01,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:01,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:01,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198222663] [2021-06-05 04:19:01,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:01,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:01,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:01,119 INFO L87 Difference]: Start difference. First operand 34136 states and 116670 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:01,363 INFO L93 Difference]: Finished difference Result 34685 states and 118130 transitions. [2021-06-05 04:19:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:19:01,363 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:01,437 INFO L225 Difference]: With dead ends: 34685 [2021-06-05 04:19:01,437 INFO L226 Difference]: Without dead ends: 34679 [2021-06-05 04:19:01,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:19:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34679 states. [2021-06-05 04:19:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34679 to 34136. [2021-06-05 04:19:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178702211806065) internal successors, (116669), 34135 states have internal predecessors, (116669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116669 transitions. [2021-06-05 04:19:02,027 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116669 transitions. Word has length 22 [2021-06-05 04:19:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:02,027 INFO L482 AbstractCegarLoop]: Abstraction has 34136 states and 116669 transitions. [2021-06-05 04:19:02,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116669 transitions. [2021-06-05 04:19:02,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:02,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:02,035 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:02,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21612,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:02,237 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:02,237 INFO L82 PathProgramCache]: Analyzing trace with hash -70592796, now seen corresponding path program 247 times [2021-06-05 04:19:02,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:02,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760006444] [2021-06-05 04:19:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:02,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:02,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760006444] [2021-06-05 04:19:02,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760006444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:02,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773371514] [2021-06-05 04:19:02,301 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 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 04:19:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:02,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:02,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:02,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773371514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:02,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:02,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:02,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944720902] [2021-06-05 04:19:02,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:02,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:02,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:02,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:02,365 INFO L87 Difference]: Start difference. First operand 34136 states and 116669 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:02,599 INFO L93 Difference]: Finished difference Result 34892 states and 118662 transitions. [2021-06-05 04:19:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:19:02,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:02,665 INFO L225 Difference]: With dead ends: 34892 [2021-06-05 04:19:02,665 INFO L226 Difference]: Without dead ends: 34892 [2021-06-05 04:19:02,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:19:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34892 states. [2021-06-05 04:19:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34892 to 34647. [2021-06-05 04:19:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.412861513594643) internal successors, (118242), 34646 states have internal predecessors, (118242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118242 transitions. [2021-06-05 04:19:03,240 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118242 transitions. Word has length 22 [2021-06-05 04:19:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:03,240 INFO L482 AbstractCegarLoop]: Abstraction has 34647 states and 118242 transitions. [2021-06-05 04:19:03,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118242 transitions. [2021-06-05 04:19:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:03,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:03,249 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:03,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21613,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:03,449 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1079562019, now seen corresponding path program 248 times [2021-06-05 04:19:03,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:03,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752116411] [2021-06-05 04:19:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:03,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:03,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752116411] [2021-06-05 04:19:03,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752116411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:03,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410321669] [2021-06-05 04:19:03,521 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 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 04:19:03,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:19:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:03,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:03,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:03,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410321669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:03,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:03,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:03,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538994121] [2021-06-05 04:19:03,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:03,583 INFO L87 Difference]: Start difference. First operand 34647 states and 118242 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:03,814 INFO L93 Difference]: Finished difference Result 35167 states and 119631 transitions. [2021-06-05 04:19:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:19:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:03,880 INFO L225 Difference]: With dead ends: 35167 [2021-06-05 04:19:03,880 INFO L226 Difference]: Without dead ends: 35160 [2021-06-05 04:19:03,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:19:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35160 states. [2021-06-05 04:19:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35160 to 34647. [2021-06-05 04:19:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.4128326502337933) internal successors, (118241), 34646 states have internal predecessors, (118241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118241 transitions. [2021-06-05 04:19:04,467 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118241 transitions. Word has length 22 [2021-06-05 04:19:04,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:04,467 INFO L482 AbstractCegarLoop]: Abstraction has 34647 states and 118241 transitions. [2021-06-05 04:19:04,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118241 transitions. [2021-06-05 04:19:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:04,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:04,476 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:04,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21614,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:04,676 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:04,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:04,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1338049974, now seen corresponding path program 249 times [2021-06-05 04:19:04,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:04,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409181500] [2021-06-05 04:19:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:04,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:04,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409181500] [2021-06-05 04:19:04,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409181500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:04,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608526117] [2021-06-05 04:19:04,743 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 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 04:19:04,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:19:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:04,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:04,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:04,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608526117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:04,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:04,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:04,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270153166] [2021-06-05 04:19:04,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:04,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:04,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:04,811 INFO L87 Difference]: Start difference. First operand 34647 states and 118241 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:05,102 INFO L93 Difference]: Finished difference Result 35095 states and 119279 transitions. [2021-06-05 04:19:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:19:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:05,168 INFO L225 Difference]: With dead ends: 35095 [2021-06-05 04:19:05,168 INFO L226 Difference]: Without dead ends: 35095 [2021-06-05 04:19:05,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:19:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35095 states. [2021-06-05 04:19:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35095 to 34867. [2021-06-05 04:19:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.410342453966615) internal successors, (118905), 34866 states have internal predecessors, (118905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118905 transitions. [2021-06-05 04:19:05,790 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118905 transitions. Word has length 22 [2021-06-05 04:19:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:05,790 INFO L482 AbstractCegarLoop]: Abstraction has 34867 states and 118905 transitions. [2021-06-05 04:19:05,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118905 transitions. [2021-06-05 04:19:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:05,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:05,799 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:05,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21615,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:05,999 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:05,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1503873255, now seen corresponding path program 250 times [2021-06-05 04:19:05,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:06,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784608475] [2021-06-05 04:19:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:06,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:06,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784608475] [2021-06-05 04:19:06,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784608475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:06,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593757029] [2021-06-05 04:19:06,075 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 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 04:19:06,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:19:06,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:06,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593757029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:06,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:06,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:06,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585048709] [2021-06-05 04:19:06,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:06,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:06,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:06,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:06,139 INFO L87 Difference]: Start difference. First operand 34867 states and 118905 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:06,386 INFO L93 Difference]: Finished difference Result 35358 states and 120222 transitions. [2021-06-05 04:19:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:19:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:06,453 INFO L225 Difference]: With dead ends: 35358 [2021-06-05 04:19:06,453 INFO L226 Difference]: Without dead ends: 35350 [2021-06-05 04:19:06,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:19:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-06-05 04:19:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34867. [2021-06-05 04:19:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.41031377272988) internal successors, (118904), 34866 states have internal predecessors, (118904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118904 transitions. [2021-06-05 04:19:07,061 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118904 transitions. Word has length 22 [2021-06-05 04:19:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:07,061 INFO L482 AbstractCegarLoop]: Abstraction has 34867 states and 118904 transitions. [2021-06-05 04:19:07,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118904 transitions. [2021-06-05 04:19:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:07,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:07,070 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:07,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21616,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:07,275 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:07,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1974516828, now seen corresponding path program 251 times [2021-06-05 04:19:07,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:07,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130740905] [2021-06-05 04:19:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:07,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:07,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130740905] [2021-06-05 04:19:07,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130740905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:07,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566997926] [2021-06-05 04:19:07,346 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 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 04:19:07,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:19:07,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:07,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:07,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:07,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566997926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:07,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:07,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:07,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585814650] [2021-06-05 04:19:07,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:07,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:07,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:07,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:07,415 INFO L87 Difference]: Start difference. First operand 34867 states and 118904 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:07,833 INFO L93 Difference]: Finished difference Result 35266 states and 119729 transitions. [2021-06-05 04:19:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:19:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:07,908 INFO L225 Difference]: With dead ends: 35266 [2021-06-05 04:19:07,909 INFO L226 Difference]: Without dead ends: 35266 [2021-06-05 04:19:07,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:19:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35266 states. [2021-06-05 04:19:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35266 to 34965. [2021-06-05 04:19:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409163711245853) internal successors, (119198), 34964 states have internal predecessors, (119198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119198 transitions. [2021-06-05 04:19:08,494 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119198 transitions. Word has length 22 [2021-06-05 04:19:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:08,494 INFO L482 AbstractCegarLoop]: Abstraction has 34965 states and 119198 transitions. [2021-06-05 04:19:08,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119198 transitions. [2021-06-05 04:19:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:08,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:08,504 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:08,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21617 [2021-06-05 04:19:08,705 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:08,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1772619683, now seen corresponding path program 252 times [2021-06-05 04:19:08,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:08,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350262846] [2021-06-05 04:19:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:08,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:08,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350262846] [2021-06-05 04:19:08,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350262846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:08,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887356068] [2021-06-05 04:19:08,793 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 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 04:19:08,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:19:08,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:08,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:08,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887356068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:08,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:08,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:08,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658864511] [2021-06-05 04:19:08,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:08,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:08,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:08,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:08,855 INFO L87 Difference]: Start difference. First operand 34965 states and 119198 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:09,106 INFO L93 Difference]: Finished difference Result 35421 states and 120437 transitions. [2021-06-05 04:19:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:19:09,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:09,176 INFO L225 Difference]: With dead ends: 35421 [2021-06-05 04:19:09,176 INFO L226 Difference]: Without dead ends: 35412 [2021-06-05 04:19:09,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:19:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35412 states. [2021-06-05 04:19:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35412 to 34965. [2021-06-05 04:19:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409135110399268) internal successors, (119197), 34964 states have internal predecessors, (119197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119197 transitions. [2021-06-05 04:19:09,759 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119197 transitions. Word has length 22 [2021-06-05 04:19:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:09,759 INFO L482 AbstractCegarLoop]: Abstraction has 34965 states and 119197 transitions. [2021-06-05 04:19:09,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119197 transitions. [2021-06-05 04:19:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:09,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:09,768 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:09,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21618,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:09,973 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:09,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:09,973 INFO L82 PathProgramCache]: Analyzing trace with hash -230152822, now seen corresponding path program 253 times [2021-06-05 04:19:09,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:09,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81137220] [2021-06-05 04:19:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:10,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:10,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81137220] [2021-06-05 04:19:10,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81137220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:10,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624542466] [2021-06-05 04:19:10,050 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 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 04:19:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:10,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:10,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:10,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624542466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:10,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:10,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:10,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360943102] [2021-06-05 04:19:10,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:10,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:10,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:10,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:10,117 INFO L87 Difference]: Start difference. First operand 34965 states and 119197 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:10,574 INFO L93 Difference]: Finished difference Result 35597 states and 120659 transitions. [2021-06-05 04:19:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 04:19:10,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:10,639 INFO L225 Difference]: With dead ends: 35597 [2021-06-05 04:19:10,639 INFO L226 Difference]: Without dead ends: 35597 [2021-06-05 04:19:10,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=778, Invalid=1574, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:19:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35597 states. [2021-06-05 04:19:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35597 to 35052. [2021-06-05 04:19:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35052 states, 35051 states have (on average 3.4081195971584264) internal successors, (119458), 35051 states have internal predecessors, (119458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35052 states to 35052 states and 119458 transitions. [2021-06-05 04:19:11,223 INFO L78 Accepts]: Start accepts. Automaton has 35052 states and 119458 transitions. Word has length 22 [2021-06-05 04:19:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:11,224 INFO L482 AbstractCegarLoop]: Abstraction has 35052 states and 119458 transitions. [2021-06-05 04:19:11,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 35052 states and 119458 transitions. [2021-06-05 04:19:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:11,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:11,232 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:11,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21619,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:11,433 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash -599127143, now seen corresponding path program 254 times [2021-06-05 04:19:11,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:11,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121003438] [2021-06-05 04:19:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:11,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:11,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121003438] [2021-06-05 04:19:11,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121003438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:11,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760529340] [2021-06-05 04:19:11,491 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 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 04:19:11,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:19:11,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:11,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:11,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 50 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:19:11,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760529340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:11,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:11,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:19:11,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704229151] [2021-06-05 04:19:11,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:19:11,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:19:11,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:19:11,554 INFO L87 Difference]: Start difference. First operand 35052 states and 119458 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:19:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:11,766 INFO L93 Difference]: Finished difference Result 35467 states and 120355 transitions. [2021-06-05 04:19:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:19:11,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:19:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:11,834 INFO L225 Difference]: With dead ends: 35467 [2021-06-05 04:19:11,834 INFO L226 Difference]: Without dead ends: 35467 [2021-06-05 04:19:11,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:19:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35467 states. [2021-06-05 04:19:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35467 to 35013. [2021-06-05 04:19:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 3.4085742031303554) internal successors, (119341), 35012 states have internal predecessors, (119341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 119341 transitions. [2021-06-05 04:19:12,458 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 119341 transitions. Word has length 22 [2021-06-05 04:19:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:12,458 INFO L482 AbstractCegarLoop]: Abstraction has 35013 states and 119341 transitions. [2021-06-05 04:19:12,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:19:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 119341 transitions. [2021-06-05 04:19:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:12,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:12,467 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:12,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21620 [2021-06-05 04:19:12,668 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:12,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1376871388, now seen corresponding path program 255 times [2021-06-05 04:19:12,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:12,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050904178] [2021-06-05 04:19:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:12,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:12,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050904178] [2021-06-05 04:19:12,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050904178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:12,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104203553] [2021-06-05 04:19:12,724 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 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 04:19:12,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:19:12,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:12,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:19:12,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104203553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:12,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:12,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:19:12,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875821865] [2021-06-05 04:19:12,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:19:12,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:12,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:19:12,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:19:12,798 INFO L87 Difference]: Start difference. First operand 35013 states and 119341 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:19:13,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:13,102 INFO L93 Difference]: Finished difference Result 35354 states and 119908 transitions. [2021-06-05 04:19:13,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:19:13,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 22 [2021-06-05 04:19:13,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:13,294 INFO L225 Difference]: With dead ends: 35354 [2021-06-05 04:19:13,294 INFO L226 Difference]: Without dead ends: 35350 [2021-06-05 04:19:13,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:19:13,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-06-05 04:19:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34236. [2021-06-05 04:19:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406192493062655) internal successors, (116611), 34235 states have internal predecessors, (116611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116611 transitions. [2021-06-05 04:19:13,826 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116611 transitions. Word has length 22 [2021-06-05 04:19:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:13,826 INFO L482 AbstractCegarLoop]: Abstraction has 34236 states and 116611 transitions. [2021-06-05 04:19:13,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 04:19:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116611 transitions. [2021-06-05 04:19:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:13,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:13,835 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:14,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21621 [2021-06-05 04:19:14,037 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1955591385, now seen corresponding path program 256 times [2021-06-05 04:19:14,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:14,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936800817] [2021-06-05 04:19:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:14,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:14,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936800817] [2021-06-05 04:19:14,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936800817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:14,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645260520] [2021-06-05 04:19:14,115 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 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 04:19:14,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:19:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:14,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645260520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:14,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:14,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:19:14,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970276116] [2021-06-05 04:19:14,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:14,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:14,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:14,172 INFO L87 Difference]: Start difference. First operand 34236 states and 116611 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:14,453 INFO L93 Difference]: Finished difference Result 34750 states and 117977 transitions. [2021-06-05 04:19:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:19:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:14,522 INFO L225 Difference]: With dead ends: 34750 [2021-06-05 04:19:14,522 INFO L226 Difference]: Without dead ends: 34744 [2021-06-05 04:19:14,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:19:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34744 states. [2021-06-05 04:19:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34744 to 34236. [2021-06-05 04:19:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406134073316781) internal successors, (116609), 34235 states have internal predecessors, (116609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116609 transitions. [2021-06-05 04:19:15,144 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116609 transitions. Word has length 22 [2021-06-05 04:19:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:15,144 INFO L482 AbstractCegarLoop]: Abstraction has 34236 states and 116609 transitions. [2021-06-05 04:19:15,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116609 transitions. [2021-06-05 04:19:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:15,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:15,153 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:15,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21622 [2021-06-05 04:19:15,354 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:15,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:15,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2119589156, now seen corresponding path program 257 times [2021-06-05 04:19:15,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:15,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176141003] [2021-06-05 04:19:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:15,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:15,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176141003] [2021-06-05 04:19:15,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176141003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:15,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477933870] [2021-06-05 04:19:15,419 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 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 04:19:15,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:19:15,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:15,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:15,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:15,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477933870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:15,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:15,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:19:15,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907694436] [2021-06-05 04:19:15,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:15,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:15,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:15,482 INFO L87 Difference]: Start difference. First operand 34236 states and 116609 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:15,861 INFO L93 Difference]: Finished difference Result 42443 states and 142235 transitions. [2021-06-05 04:19:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:19:15,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:15,953 INFO L225 Difference]: With dead ends: 42443 [2021-06-05 04:19:15,954 INFO L226 Difference]: Without dead ends: 42443 [2021-06-05 04:19:15,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=452, Invalid=880, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:19:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42443 states. [2021-06-05 04:19:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42443 to 40328. [2021-06-05 04:19:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386341656954398) internal successors, (136561), 40327 states have internal predecessors, (136561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136561 transitions. [2021-06-05 04:19:16,713 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136561 transitions. Word has length 22 [2021-06-05 04:19:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:16,713 INFO L482 AbstractCegarLoop]: Abstraction has 40328 states and 136561 transitions. [2021-06-05 04:19:16,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136561 transitions. [2021-06-05 04:19:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:16,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:16,723 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:16,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21623 [2021-06-05 04:19:16,923 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1319124531, now seen corresponding path program 258 times [2021-06-05 04:19:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:16,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016843343] [2021-06-05 04:19:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:16,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:16,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016843343] [2021-06-05 04:19:16,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016843343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:16,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580760797] [2021-06-05 04:19:16,989 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 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 04:19:17,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:19:17,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:17,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:17,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:17,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580760797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:17,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:17,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:17,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115566736] [2021-06-05 04:19:17,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:17,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:17,054 INFO L87 Difference]: Start difference. First operand 40328 states and 136561 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:17,340 INFO L93 Difference]: Finished difference Result 40963 states and 138166 transitions. [2021-06-05 04:19:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:19:17,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:17,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:17,424 INFO L225 Difference]: With dead ends: 40963 [2021-06-05 04:19:17,425 INFO L226 Difference]: Without dead ends: 40957 [2021-06-05 04:19:17,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:19:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40957 states. [2021-06-05 04:19:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40957 to 40328. [2021-06-05 04:19:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386292062389962) internal successors, (136559), 40327 states have internal predecessors, (136559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136559 transitions. [2021-06-05 04:19:18,163 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136559 transitions. Word has length 22 [2021-06-05 04:19:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:18,163 INFO L482 AbstractCegarLoop]: Abstraction has 40328 states and 136559 transitions. [2021-06-05 04:19:18,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136559 transitions. [2021-06-05 04:19:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:18,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:18,173 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:18,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21624,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:18,373 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:18,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:18,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1483122302, now seen corresponding path program 259 times [2021-06-05 04:19:18,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:18,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962585661] [2021-06-05 04:19:18,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:18,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962585661] [2021-06-05 04:19:18,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962585661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:18,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130233274] [2021-06-05 04:19:18,437 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 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 04:19:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:18,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:18,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130233274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:18,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:18,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:18,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763940795] [2021-06-05 04:19:18,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:18,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:18,524 INFO L87 Difference]: Start difference. First operand 40328 states and 136559 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:18,913 INFO L93 Difference]: Finished difference Result 47750 states and 159770 transitions. [2021-06-05 04:19:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:19:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:19,007 INFO L225 Difference]: With dead ends: 47750 [2021-06-05 04:19:19,007 INFO L226 Difference]: Without dead ends: 47750 [2021-06-05 04:19:19,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=461, Invalid=871, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:19:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47750 states. [2021-06-05 04:19:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47750 to 35545. [2021-06-05 04:19:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35545 states, 35544 states have (on average 3.380429889714157) internal successors, (120154), 35544 states have internal predecessors, (120154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35545 states to 35545 states and 120154 transitions. [2021-06-05 04:19:19,702 INFO L78 Accepts]: Start accepts. Automaton has 35545 states and 120154 transitions. Word has length 22 [2021-06-05 04:19:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:19,702 INFO L482 AbstractCegarLoop]: Abstraction has 35545 states and 120154 transitions. [2021-06-05 04:19:19,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 35545 states and 120154 transitions. [2021-06-05 04:19:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:19,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:19,712 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:19,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21625,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:19,913 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash 474153079, now seen corresponding path program 260 times [2021-06-05 04:19:19,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:19,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845317628] [2021-06-05 04:19:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:19,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:19,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845317628] [2021-06-05 04:19:19,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845317628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:19,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275805154] [2021-06-05 04:19:19,991 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 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 04:19:20,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:19:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:20,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:20,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275805154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:20,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:20,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:20,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653808798] [2021-06-05 04:19:20,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:20,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:20,060 INFO L87 Difference]: Start difference. First operand 35545 states and 120154 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:20,393 INFO L93 Difference]: Finished difference Result 36460 states and 122661 transitions. [2021-06-05 04:19:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:19:20,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:20,464 INFO L225 Difference]: With dead ends: 36460 [2021-06-05 04:19:20,464 INFO L226 Difference]: Without dead ends: 36453 [2021-06-05 04:19:20,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:19:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36453 states. [2021-06-05 04:19:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36453 to 35618. [2021-06-05 04:19:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35618 states, 35617 states have (on average 3.3797624729763878) internal successors, (120377), 35617 states have internal predecessors, (120377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35618 states to 35618 states and 120377 transitions. [2021-06-05 04:19:21,115 INFO L78 Accepts]: Start accepts. Automaton has 35618 states and 120377 transitions. Word has length 22 [2021-06-05 04:19:21,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:21,115 INFO L482 AbstractCegarLoop]: Abstraction has 35618 states and 120377 transitions. [2021-06-05 04:19:21,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:21,115 INFO L276 IsEmpty]: Start isEmpty. Operand 35618 states and 120377 transitions. [2021-06-05 04:19:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:21,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:21,125 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:21,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21626,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:21,325 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 215665124, now seen corresponding path program 261 times [2021-06-05 04:19:21,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:21,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292520052] [2021-06-05 04:19:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:21,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:21,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292520052] [2021-06-05 04:19:21,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292520052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:21,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096605970] [2021-06-05 04:19:21,392 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 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 04:19:21,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:19:21,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:21,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096605970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:21,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:21,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:21,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555084640] [2021-06-05 04:19:21,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:21,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:21,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:21,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:21,461 INFO L87 Difference]: Start difference. First operand 35618 states and 120377 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:21,907 INFO L93 Difference]: Finished difference Result 40432 states and 135039 transitions. [2021-06-05 04:19:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:19:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:21,987 INFO L225 Difference]: With dead ends: 40432 [2021-06-05 04:19:21,987 INFO L226 Difference]: Without dead ends: 40432 [2021-06-05 04:19:21,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=641, Invalid=1251, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:19:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40432 states. [2021-06-05 04:19:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40432 to 35682. [2021-06-05 04:19:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35682 states, 35681 states have (on average 3.3822202292536643) internal successors, (120681), 35681 states have internal predecessors, (120681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35682 states to 35682 states and 120681 transitions. [2021-06-05 04:19:22,618 INFO L78 Accepts]: Start accepts. Automaton has 35682 states and 120681 transitions. Word has length 22 [2021-06-05 04:19:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:22,619 INFO L482 AbstractCegarLoop]: Abstraction has 35682 states and 120681 transitions. [2021-06-05 04:19:22,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 35682 states and 120681 transitions. [2021-06-05 04:19:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:22,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:22,628 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:22,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21627,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:22,829 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:22,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1231478759, now seen corresponding path program 262 times [2021-06-05 04:19:22,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:22,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745805229] [2021-06-05 04:19:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:22,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:22,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745805229] [2021-06-05 04:19:22,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745805229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:22,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891314064] [2021-06-05 04:19:22,897 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 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 04:19:22,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:19:22,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:22,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:22,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:22,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891314064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:22,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:22,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:22,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123491392] [2021-06-05 04:19:22,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:22,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:22,960 INFO L87 Difference]: Start difference. First operand 35682 states and 120681 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:23,232 INFO L93 Difference]: Finished difference Result 36907 states and 124167 transitions. [2021-06-05 04:19:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:19:23,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:23,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:23,302 INFO L225 Difference]: With dead ends: 36907 [2021-06-05 04:19:23,303 INFO L226 Difference]: Without dead ends: 36901 [2021-06-05 04:19:23,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36901 states. [2021-06-05 04:19:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36901 to 35689. [2021-06-05 04:19:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35689 states, 35688 states have (on average 3.3821452589105583) internal successors, (120702), 35688 states have internal predecessors, (120702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35689 states to 35689 states and 120702 transitions. [2021-06-05 04:19:23,926 INFO L78 Accepts]: Start accepts. Automaton has 35689 states and 120702 transitions. Word has length 22 [2021-06-05 04:19:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:23,926 INFO L482 AbstractCegarLoop]: Abstraction has 35689 states and 120702 transitions. [2021-06-05 04:19:23,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 35689 states and 120702 transitions. [2021-06-05 04:19:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:23,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:23,936 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:24,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21628 [2021-06-05 04:19:24,137 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:24,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1067480988, now seen corresponding path program 263 times [2021-06-05 04:19:24,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:24,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829471516] [2021-06-05 04:19:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:24,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:24,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829471516] [2021-06-05 04:19:24,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829471516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:24,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466830323] [2021-06-05 04:19:24,200 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 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 04:19:24,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:19:24,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:24,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:24,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:24,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466830323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:24,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:24,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:24,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286499938] [2021-06-05 04:19:24,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:24,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:24,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:24,268 INFO L87 Difference]: Start difference. First operand 35689 states and 120702 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:24,586 INFO L93 Difference]: Finished difference Result 37769 states and 126742 transitions. [2021-06-05 04:19:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:19:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:24,656 INFO L225 Difference]: With dead ends: 37769 [2021-06-05 04:19:24,656 INFO L226 Difference]: Without dead ends: 37769 [2021-06-05 04:19:24,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:19:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37769 states. [2021-06-05 04:19:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37769 to 35344. [2021-06-05 04:19:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387177093059446) internal successors, (119713), 35343 states have internal predecessors, (119713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:25,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119713 transitions. [2021-06-05 04:19:25,279 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119713 transitions. Word has length 22 [2021-06-05 04:19:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:25,279 INFO L482 AbstractCegarLoop]: Abstraction has 35344 states and 119713 transitions. [2021-06-05 04:19:25,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119713 transitions. [2021-06-05 04:19:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:25,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:25,288 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:25,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21629,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:25,493 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2076450211, now seen corresponding path program 264 times [2021-06-05 04:19:25,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:25,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352769035] [2021-06-05 04:19:25,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:25,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352769035] [2021-06-05 04:19:25,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352769035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927047910] [2021-06-05 04:19:25,561 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 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 04:19:25,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:19:25,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:25,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927047910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:25,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:25,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:25,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544092396] [2021-06-05 04:19:25,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:25,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:25,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:25,624 INFO L87 Difference]: Start difference. First operand 35344 states and 119713 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:25,876 INFO L93 Difference]: Finished difference Result 35796 states and 120895 transitions. [2021-06-05 04:19:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:19:25,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:25,946 INFO L225 Difference]: With dead ends: 35796 [2021-06-05 04:19:25,946 INFO L226 Difference]: Without dead ends: 35789 [2021-06-05 04:19:25,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35789 states. [2021-06-05 04:19:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35789 to 35344. [2021-06-05 04:19:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387148798913505) internal successors, (119712), 35343 states have internal predecessors, (119712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119712 transitions. [2021-06-05 04:19:26,550 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119712 transitions. Word has length 22 [2021-06-05 04:19:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:26,550 INFO L482 AbstractCegarLoop]: Abstraction has 35344 states and 119712 transitions. [2021-06-05 04:19:26,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:26,550 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119712 transitions. [2021-06-05 04:19:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:26,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:26,560 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:26,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21630 [2021-06-05 04:19:26,760 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:26,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1960029130, now seen corresponding path program 265 times [2021-06-05 04:19:26,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:26,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884397310] [2021-06-05 04:19:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:26,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:26,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884397310] [2021-06-05 04:19:26,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884397310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:26,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489107494] [2021-06-05 04:19:26,825 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 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 04:19:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:26,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:26,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:26,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489107494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:26,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:26,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:26,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645172540] [2021-06-05 04:19:26,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:26,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:26,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:26,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:26,901 INFO L87 Difference]: Start difference. First operand 35344 states and 119712 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:27,292 INFO L93 Difference]: Finished difference Result 36722 states and 123439 transitions. [2021-06-05 04:19:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:19:27,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:27,365 INFO L225 Difference]: With dead ends: 36722 [2021-06-05 04:19:27,366 INFO L226 Difference]: Without dead ends: 36722 [2021-06-05 04:19:27,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=517, Invalid=1043, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:19:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36722 states. [2021-06-05 04:19:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36722 to 35442. [2021-06-05 04:19:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.387799441325019) internal successors, (120067), 35441 states have internal predecessors, (120067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120067 transitions. [2021-06-05 04:19:27,983 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120067 transitions. Word has length 22 [2021-06-05 04:19:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:27,983 INFO L482 AbstractCegarLoop]: Abstraction has 35442 states and 120067 transitions. [2021-06-05 04:19:27,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120067 transitions. [2021-06-05 04:19:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:27,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:27,993 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:28,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21631 [2021-06-05 04:19:28,193 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:28,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1794205849, now seen corresponding path program 266 times [2021-06-05 04:19:28,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:28,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486079734] [2021-06-05 04:19:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:28,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:28,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486079734] [2021-06-05 04:19:28,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486079734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:28,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537079543] [2021-06-05 04:19:28,266 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 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 04:19:28,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:19:28,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:28,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:28,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:28,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537079543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:28,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:28,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:28,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941358724] [2021-06-05 04:19:28,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:28,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:28,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:28,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:28,330 INFO L87 Difference]: Start difference. First operand 35442 states and 120067 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:28,577 INFO L93 Difference]: Finished difference Result 35860 states and 121183 transitions. [2021-06-05 04:19:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:19:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:28,649 INFO L225 Difference]: With dead ends: 35860 [2021-06-05 04:19:28,649 INFO L226 Difference]: Without dead ends: 35852 [2021-06-05 04:19:28,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35852 states. [2021-06-05 04:19:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35852 to 35442. [2021-06-05 04:19:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.38777122541689) internal successors, (120066), 35441 states have internal predecessors, (120066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120066 transitions. [2021-06-05 04:19:29,255 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120066 transitions. Word has length 22 [2021-06-05 04:19:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:29,255 INFO L482 AbstractCegarLoop]: Abstraction has 35442 states and 120066 transitions. [2021-06-05 04:19:29,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:29,255 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120066 transitions. [2021-06-05 04:19:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:29,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:29,264 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:29,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21632 [2021-06-05 04:19:29,469 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1323562276, now seen corresponding path program 267 times [2021-06-05 04:19:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:29,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030871839] [2021-06-05 04:19:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:29,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:29,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030871839] [2021-06-05 04:19:29,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030871839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:29,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391979233] [2021-06-05 04:19:29,537 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 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 04:19:29,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:19:29,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:29,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:29,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391979233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:29,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:29,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:29,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999400819] [2021-06-05 04:19:29,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:29,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:29,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:29,606 INFO L87 Difference]: Start difference. First operand 35442 states and 120066 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:30,159 INFO L93 Difference]: Finished difference Result 36817 states and 123640 transitions. [2021-06-05 04:19:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:19:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:30,221 INFO L225 Difference]: With dead ends: 36817 [2021-06-05 04:19:30,221 INFO L226 Difference]: Without dead ends: 36817 [2021-06-05 04:19:30,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 315.6ms TimeCoverageRelationStatistics Valid=752, Invalid=1504, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:19:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36817 states. [2021-06-05 04:19:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36817 to 35424. [2021-06-05 04:19:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35424 states, 35423 states have (on average 3.3881376506789374) internal successors, (120018), 35423 states have internal predecessors, (120018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35424 states to 35424 states and 120018 transitions. [2021-06-05 04:19:30,783 INFO L78 Accepts]: Start accepts. Automaton has 35424 states and 120018 transitions. Word has length 22 [2021-06-05 04:19:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:30,783 INFO L482 AbstractCegarLoop]: Abstraction has 35424 states and 120018 transitions. [2021-06-05 04:19:30,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 35424 states and 120018 transitions. [2021-06-05 04:19:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:30,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:30,792 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:30,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21633 [2021-06-05 04:19:30,993 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:30,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1304197875, now seen corresponding path program 268 times [2021-06-05 04:19:30,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:30,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532800689] [2021-06-05 04:19:30,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:31,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:31,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532800689] [2021-06-05 04:19:31,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532800689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:31,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197917318] [2021-06-05 04:19:31,060 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 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 04:19:31,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:19:31,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:31,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:31,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:31,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197917318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:31,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:31,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:31,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236792618] [2021-06-05 04:19:31,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:31,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:31,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:31,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:31,137 INFO L87 Difference]: Start difference. First operand 35424 states and 120018 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:31,403 INFO L93 Difference]: Finished difference Result 37279 states and 125493 transitions. [2021-06-05 04:19:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:19:31,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:31,472 INFO L225 Difference]: With dead ends: 37279 [2021-06-05 04:19:31,473 INFO L226 Difference]: Without dead ends: 37273 [2021-06-05 04:19:31,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37273 states. [2021-06-05 04:19:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37273 to 35486. [2021-06-05 04:19:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35486 states, 35485 states have (on average 3.3883049175708044) internal successors, (120234), 35485 states have internal predecessors, (120234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35486 states to 35486 states and 120234 transitions. [2021-06-05 04:19:32,108 INFO L78 Accepts]: Start accepts. Automaton has 35486 states and 120234 transitions. Word has length 22 [2021-06-05 04:19:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:32,108 INFO L482 AbstractCegarLoop]: Abstraction has 35486 states and 120234 transitions. [2021-06-05 04:19:32,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 35486 states and 120234 transitions. [2021-06-05 04:19:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:32,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:32,118 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:32,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21634,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:32,318 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1468195646, now seen corresponding path program 269 times [2021-06-05 04:19:32,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:32,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210221801] [2021-06-05 04:19:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:32,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210221801] [2021-06-05 04:19:32,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210221801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669842526] [2021-06-05 04:19:32,380 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 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 04:19:32,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:19:32,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:32,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:32,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669842526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:32,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:32,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:32,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507110878] [2021-06-05 04:19:32,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:32,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:32,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:32,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:32,448 INFO L87 Difference]: Start difference. First operand 35486 states and 120234 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:32,751 INFO L93 Difference]: Finished difference Result 36239 states and 122100 transitions. [2021-06-05 04:19:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:19:32,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:32,820 INFO L225 Difference]: With dead ends: 36239 [2021-06-05 04:19:32,820 INFO L226 Difference]: Without dead ends: 36239 [2021-06-05 04:19:32,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:19:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36239 states. [2021-06-05 04:19:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36239 to 35451. [2021-06-05 04:19:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.389026798307475) internal successors, (120141), 35450 states have internal predecessors, (120141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120141 transitions. [2021-06-05 04:19:33,413 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120141 transitions. Word has length 22 [2021-06-05 04:19:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:33,413 INFO L482 AbstractCegarLoop]: Abstraction has 35451 states and 120141 transitions. [2021-06-05 04:19:33,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120141 transitions. [2021-06-05 04:19:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:33,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:33,423 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:33,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21635,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:33,625 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash 459226423, now seen corresponding path program 270 times [2021-06-05 04:19:33,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:33,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506599680] [2021-06-05 04:19:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:33,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:33,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506599680] [2021-06-05 04:19:33,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506599680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:33,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52309441] [2021-06-05 04:19:33,692 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 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 04:19:33,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:19:33,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:33,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:33,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52309441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:33,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:33,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:33,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987073442] [2021-06-05 04:19:33,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:33,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:33,757 INFO L87 Difference]: Start difference. First operand 35451 states and 120141 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:34,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:34,003 INFO L93 Difference]: Finished difference Result 35974 states and 121515 transitions. [2021-06-05 04:19:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:19:34,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:34,073 INFO L225 Difference]: With dead ends: 35974 [2021-06-05 04:19:34,073 INFO L226 Difference]: Without dead ends: 35967 [2021-06-05 04:19:34,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35967 states. [2021-06-05 04:19:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35967 to 35451. [2021-06-05 04:19:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.3889985895627643) internal successors, (120140), 35450 states have internal predecessors, (120140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120140 transitions. [2021-06-05 04:19:34,674 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120140 transitions. Word has length 22 [2021-06-05 04:19:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:34,675 INFO L482 AbstractCegarLoop]: Abstraction has 35451 states and 120140 transitions. [2021-06-05 04:19:34,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120140 transitions. [2021-06-05 04:19:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:34,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:34,684 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:34,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21636,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:34,885 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:34,885 INFO L82 PathProgramCache]: Analyzing trace with hash 200738468, now seen corresponding path program 271 times [2021-06-05 04:19:34,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:34,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207070696] [2021-06-05 04:19:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:34,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:34,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207070696] [2021-06-05 04:19:34,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207070696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:34,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390181187] [2021-06-05 04:19:34,951 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 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 04:19:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:34,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:34,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:35,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390181187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:35,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:35,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:35,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601268589] [2021-06-05 04:19:35,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:35,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:35,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:35,017 INFO L87 Difference]: Start difference. First operand 35451 states and 120140 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:35,319 INFO L93 Difference]: Finished difference Result 35935 states and 121243 transitions. [2021-06-05 04:19:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:19:35,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:35,389 INFO L225 Difference]: With dead ends: 35935 [2021-06-05 04:19:35,389 INFO L226 Difference]: Without dead ends: 35935 [2021-06-05 04:19:35,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:19:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35935 states. [2021-06-05 04:19:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35935 to 35458. [2021-06-05 04:19:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389062808472234) internal successors, (120166), 35457 states have internal predecessors, (120166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120166 transitions. [2021-06-05 04:19:35,981 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120166 transitions. Word has length 22 [2021-06-05 04:19:35,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:35,981 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120166 transitions. [2021-06-05 04:19:35,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120166 transitions. [2021-06-05 04:19:35,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:35,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:35,991 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:36,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21637,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:36,191 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:36,192 INFO L82 PathProgramCache]: Analyzing trace with hash 34915187, now seen corresponding path program 272 times [2021-06-05 04:19:36,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:36,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629951594] [2021-06-05 04:19:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:36,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629951594] [2021-06-05 04:19:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629951594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335520233] [2021-06-05 04:19:36,264 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 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 04:19:36,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:19:36,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:36,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:36,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335520233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:36,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:36,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:36,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377319914] [2021-06-05 04:19:36,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:36,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:36,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:36,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:36,327 INFO L87 Difference]: Start difference. First operand 35458 states and 120166 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:36,566 INFO L93 Difference]: Finished difference Result 35954 states and 121474 transitions. [2021-06-05 04:19:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:19:36,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:36,638 INFO L225 Difference]: With dead ends: 35954 [2021-06-05 04:19:36,638 INFO L226 Difference]: Without dead ends: 35946 [2021-06-05 04:19:36,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35946 states. [2021-06-05 04:19:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35946 to 35458. [2021-06-05 04:19:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-06-05 04:19:37,246 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-06-05 04:19:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:37,246 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-06-05 04:19:37,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-06-05 04:19:37,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:37,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:37,256 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:37,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21638,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:37,472 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:37,472 INFO L82 PathProgramCache]: Analyzing trace with hash -435728386, now seen corresponding path program 273 times [2021-06-05 04:19:37,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:37,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368543262] [2021-06-05 04:19:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:37,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368543262] [2021-06-05 04:19:37,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368543262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565354159] [2021-06-05 04:19:37,553 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 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 04:19:37,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:19:37,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:37,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565354159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:37,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:37,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:37,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742998971] [2021-06-05 04:19:37,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:37,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:37,622 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:38,058 INFO L93 Difference]: Finished difference Result 35839 states and 120966 transitions. [2021-06-05 04:19:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:19:38,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:38,126 INFO L225 Difference]: With dead ends: 35839 [2021-06-05 04:19:38,126 INFO L226 Difference]: Without dead ends: 35839 [2021-06-05 04:19:38,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=592, Invalid=1214, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:19:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35839 states. [2021-06-05 04:19:38,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35839 to 35458. [2021-06-05 04:19:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-06-05 04:19:38,737 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-06-05 04:19:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:38,737 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-06-05 04:19:38,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-06-05 04:19:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:38,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:38,747 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:38,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21639,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:38,947 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:38,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:38,947 INFO L82 PathProgramCache]: Analyzing trace with hash -233831241, now seen corresponding path program 274 times [2021-06-05 04:19:38,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:38,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686144200] [2021-06-05 04:19:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:39,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:39,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686144200] [2021-06-05 04:19:39,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686144200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:39,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598263509] [2021-06-05 04:19:39,037 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 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 04:19:39,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:19:39,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:39,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:39,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598263509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:39,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:39,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:39,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519953217] [2021-06-05 04:19:39,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:39,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:39,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:39,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:39,102 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:39,360 INFO L93 Difference]: Finished difference Result 35916 states and 121397 transitions. [2021-06-05 04:19:39,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:19:39,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:39,431 INFO L225 Difference]: With dead ends: 35916 [2021-06-05 04:19:39,431 INFO L226 Difference]: Without dead ends: 35907 [2021-06-05 04:19:39,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35907 states. [2021-06-05 04:19:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35907 to 35458. [2021-06-05 04:19:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389006402120879) internal successors, (120164), 35457 states have internal predecessors, (120164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120164 transitions. [2021-06-05 04:19:40,039 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120164 transitions. Word has length 22 [2021-06-05 04:19:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:40,039 INFO L482 AbstractCegarLoop]: Abstraction has 35458 states and 120164 transitions. [2021-06-05 04:19:40,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:40,039 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120164 transitions. [2021-06-05 04:19:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:40,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:40,048 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:40,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21640 [2021-06-05 04:19:40,264 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1308635620, now seen corresponding path program 275 times [2021-06-05 04:19:40,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:40,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735732127] [2021-06-05 04:19:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:40,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:40,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735732127] [2021-06-05 04:19:40,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735732127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:40,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581791111] [2021-06-05 04:19:40,339 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 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 04:19:40,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:19:40,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:40,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:40,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:40,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581791111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:40,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:40,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:40,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702150976] [2021-06-05 04:19:40,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:40,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:40,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:40,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:40,409 INFO L87 Difference]: Start difference. First operand 35458 states and 120164 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:40,934 INFO L93 Difference]: Finished difference Result 35992 states and 121396 transitions. [2021-06-05 04:19:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 04:19:40,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:41,004 INFO L225 Difference]: With dead ends: 35992 [2021-06-05 04:19:41,004 INFO L226 Difference]: Without dead ends: 35992 [2021-06-05 04:19:41,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=777, Invalid=1575, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:19:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35992 states. [2021-06-05 04:19:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35992 to 35459. [2021-06-05 04:19:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35459 states, 35458 states have (on average 3.3889954312143944) internal successors, (120167), 35458 states have internal predecessors, (120167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35459 states to 35459 states and 120167 transitions. [2021-06-05 04:19:41,603 INFO L78 Accepts]: Start accepts. Automaton has 35459 states and 120167 transitions. Word has length 22 [2021-06-05 04:19:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:41,603 INFO L482 AbstractCegarLoop]: Abstraction has 35459 states and 120167 transitions. [2021-06-05 04:19:41,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 35459 states and 120167 transitions. [2021-06-05 04:19:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:41,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:41,613 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:41,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21641,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:41,813 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1917455481, now seen corresponding path program 276 times [2021-06-05 04:19:41,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:41,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73072270] [2021-06-05 04:19:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:41,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:41,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73072270] [2021-06-05 04:19:41,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73072270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:41,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487611345] [2021-06-05 04:19:41,872 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 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 04:19:41,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:19:41,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:41,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:41,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:19:41,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487611345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:41,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:41,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:19:41,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45007024] [2021-06-05 04:19:41,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:19:41,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:41,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:19:41,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:19:41,932 INFO L87 Difference]: Start difference. First operand 35459 states and 120167 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:19:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:42,105 INFO L93 Difference]: Finished difference Result 35845 states and 120782 transitions. [2021-06-05 04:19:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:19:42,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:19:42,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:42,171 INFO L225 Difference]: With dead ends: 35845 [2021-06-05 04:19:42,172 INFO L226 Difference]: Without dead ends: 35845 [2021-06-05 04:19:42,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35845 states. [2021-06-05 04:19:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35845 to 35470. [2021-06-05 04:19:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35470 states, 35469 states have (on average 3.389128534776847) internal successors, (120209), 35469 states have internal predecessors, (120209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35470 states to 35470 states and 120209 transitions. [2021-06-05 04:19:42,791 INFO L78 Accepts]: Start accepts. Automaton has 35470 states and 120209 transitions. Word has length 22 [2021-06-05 04:19:42,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:42,792 INFO L482 AbstractCegarLoop]: Abstraction has 35470 states and 120209 transitions. [2021-06-05 04:19:42,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:19:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 35470 states and 120209 transitions. [2021-06-05 04:19:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:42,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:42,801 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:43,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21642 [2021-06-05 04:19:43,001 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:43,002 INFO L82 PathProgramCache]: Analyzing trace with hash -834165348, now seen corresponding path program 277 times [2021-06-05 04:19:43,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:43,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806494862] [2021-06-05 04:19:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:43,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:43,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806494862] [2021-06-05 04:19:43,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806494862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:43,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083882216] [2021-06-05 04:19:43,058 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 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 04:19:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:43,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:43,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:19:43,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083882216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:43,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:43,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:19:43,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047095194] [2021-06-05 04:19:43,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:19:43,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:43,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:19:43,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:19:43,113 INFO L87 Difference]: Start difference. First operand 35470 states and 120209 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:19:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:43,381 INFO L93 Difference]: Finished difference Result 36773 states and 124101 transitions. [2021-06-05 04:19:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:19:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:19:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:43,455 INFO L225 Difference]: With dead ends: 36773 [2021-06-05 04:19:43,455 INFO L226 Difference]: Without dead ends: 36769 [2021-06-05 04:19:43,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:19:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36769 states. [2021-06-05 04:19:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36769 to 36539. [2021-06-05 04:19:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.388362800372215) internal successors, (123804), 36538 states have internal predecessors, (123804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:44,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123804 transitions. [2021-06-05 04:19:44,094 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123804 transitions. Word has length 22 [2021-06-05 04:19:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:44,094 INFO L482 AbstractCegarLoop]: Abstraction has 36539 states and 123804 transitions. [2021-06-05 04:19:44,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:19:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123804 transitions. [2021-06-05 04:19:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:44,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:44,104 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:44,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21643,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:44,304 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:44,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash -177363171, now seen corresponding path program 278 times [2021-06-05 04:19:44,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:44,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52682288] [2021-06-05 04:19:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:44,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:44,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52682288] [2021-06-05 04:19:44,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52682288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:44,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035977143] [2021-06-05 04:19:44,365 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 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 04:19:44,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:19:44,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:44,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:44,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035977143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:44,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:44,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:19:44,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16939366] [2021-06-05 04:19:44,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:19:44,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:44,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:19:44,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:19:44,419 INFO L87 Difference]: Start difference. First operand 36539 states and 123804 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:19:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:44,687 INFO L93 Difference]: Finished difference Result 36910 states and 124367 transitions. [2021-06-05 04:19:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:19:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:19:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:44,756 INFO L225 Difference]: With dead ends: 36910 [2021-06-05 04:19:44,756 INFO L226 Difference]: Without dead ends: 36909 [2021-06-05 04:19:44,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:19:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36909 states. [2021-06-05 04:19:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36909 to 36539. [2021-06-05 04:19:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.3881164814713447) internal successors, (123795), 36538 states have internal predecessors, (123795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123795 transitions. [2021-06-05 04:19:45,415 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123795 transitions. Word has length 22 [2021-06-05 04:19:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:45,415 INFO L482 AbstractCegarLoop]: Abstraction has 36539 states and 123795 transitions. [2021-06-05 04:19:45,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:19:45,415 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123795 transitions. [2021-06-05 04:19:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:45,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:45,425 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:45,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21644 [2021-06-05 04:19:45,625 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:45,626 INFO L82 PathProgramCache]: Analyzing trace with hash 745055562, now seen corresponding path program 279 times [2021-06-05 04:19:45,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:45,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435840500] [2021-06-05 04:19:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:45,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:45,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435840500] [2021-06-05 04:19:45,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435840500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:45,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093317376] [2021-06-05 04:19:45,682 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 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 04:19:45,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:19:45,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:45,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:45,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:45,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093317376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:45,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:45,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:19:45,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244217115] [2021-06-05 04:19:45,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:19:45,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:19:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:19:45,742 INFO L87 Difference]: Start difference. First operand 36539 states and 123795 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) 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 04:19:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:45,942 INFO L93 Difference]: Finished difference Result 37170 states and 125257 transitions. [2021-06-05 04:19:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:19:45,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 22 [2021-06-05 04:19:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:46,011 INFO L225 Difference]: With dead ends: 37170 [2021-06-05 04:19:46,011 INFO L226 Difference]: Without dead ends: 37170 [2021-06-05 04:19:46,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:19:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37170 states. [2021-06-05 04:19:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37170 to 36554. [2021-06-05 04:19:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.3879024977430032) internal successors, (123838), 36553 states have internal predecessors, (123838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123838 transitions. [2021-06-05 04:19:46,774 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123838 transitions. Word has length 22 [2021-06-05 04:19:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:46,774 INFO L482 AbstractCegarLoop]: Abstraction has 36554 states and 123838 transitions. [2021-06-05 04:19:46,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) 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 04:19:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123838 transitions. [2021-06-05 04:19:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:46,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:46,784 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:46,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21645 [2021-06-05 04:19:46,984 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:46,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1533250137, now seen corresponding path program 280 times [2021-06-05 04:19:46,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:46,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762261463] [2021-06-05 04:19:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:47,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:47,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762261463] [2021-06-05 04:19:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762261463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:47,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116087644] [2021-06-05 04:19:47,057 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 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 04:19:47,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:19:47,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:47,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:47,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116087644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:47,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:47,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:19:47,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747582197] [2021-06-05 04:19:47,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:47,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:47,120 INFO L87 Difference]: Start difference. First operand 36554 states and 123838 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:47,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:47,392 INFO L93 Difference]: Finished difference Result 36930 states and 124408 transitions. [2021-06-05 04:19:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:19:47,392 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:47,463 INFO L225 Difference]: With dead ends: 36930 [2021-06-05 04:19:47,463 INFO L226 Difference]: Without dead ends: 36928 [2021-06-05 04:19:47,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:19:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36928 states. [2021-06-05 04:19:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36928 to 36554. [2021-06-05 04:19:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.387847782671737) internal successors, (123836), 36553 states have internal predecessors, (123836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123836 transitions. [2021-06-05 04:19:48,123 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123836 transitions. Word has length 22 [2021-06-05 04:19:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:48,123 INFO L482 AbstractCegarLoop]: Abstraction has 36554 states and 123836 transitions. [2021-06-05 04:19:48,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123836 transitions. [2021-06-05 04:19:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:48,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:48,132 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:48,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21646,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:48,333 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash -983991772, now seen corresponding path program 281 times [2021-06-05 04:19:48,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:48,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587757164] [2021-06-05 04:19:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:48,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:48,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587757164] [2021-06-05 04:19:48,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587757164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:48,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336103990] [2021-06-05 04:19:48,387 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 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 04:19:48,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:19:48,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:48,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336103990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:48,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:48,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:19:48,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7570460] [2021-06-05 04:19:48,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:48,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:48,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:48,463 INFO L87 Difference]: Start difference. First operand 36554 states and 123836 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:48,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:48,684 INFO L93 Difference]: Finished difference Result 37526 states and 126283 transitions. [2021-06-05 04:19:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:19:48,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:48,754 INFO L225 Difference]: With dead ends: 37526 [2021-06-05 04:19:48,754 INFO L226 Difference]: Without dead ends: 37526 [2021-06-05 04:19:48,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:19:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37526 states. [2021-06-05 04:19:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37526 to 36659. [2021-06-05 04:19:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36659 states, 36658 states have (on average 3.386627748376889) internal successors, (124147), 36658 states have internal predecessors, (124147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36659 states to 36659 states and 124147 transitions. [2021-06-05 04:19:49,487 INFO L78 Accepts]: Start accepts. Automaton has 36659 states and 124147 transitions. Word has length 22 [2021-06-05 04:19:49,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:49,487 INFO L482 AbstractCegarLoop]: Abstraction has 36659 states and 124147 transitions. [2021-06-05 04:19:49,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:49,487 INFO L276 IsEmpty]: Start isEmpty. Operand 36659 states and 124147 transitions. [2021-06-05 04:19:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:49,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:49,497 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:49,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21647,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:49,697 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:49,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1272312163, now seen corresponding path program 282 times [2021-06-05 04:19:49,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:49,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246939667] [2021-06-05 04:19:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:49,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246939667] [2021-06-05 04:19:49,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246939667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269085683] [2021-06-05 04:19:49,755 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 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 04:19:49,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:19:49,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:49,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269085683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:49,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:49,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:19:49,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931007464] [2021-06-05 04:19:49,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:49,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:49,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:49,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:49,819 INFO L87 Difference]: Start difference. First operand 36659 states and 124147 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:50,109 INFO L93 Difference]: Finished difference Result 44560 states and 150459 transitions. [2021-06-05 04:19:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:19:50,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:50,192 INFO L225 Difference]: With dead ends: 44560 [2021-06-05 04:19:50,193 INFO L226 Difference]: Without dead ends: 44557 [2021-06-05 04:19:50,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:19:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44557 states. [2021-06-05 04:19:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44557 to 37399. [2021-06-05 04:19:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37399 states, 37398 states have (on average 3.3886571474410396) internal successors, (126729), 37398 states have internal predecessors, (126729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37399 states to 37399 states and 126729 transitions. [2021-06-05 04:19:50,909 INFO L78 Accepts]: Start accepts. Automaton has 37399 states and 126729 transitions. Word has length 22 [2021-06-05 04:19:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:50,909 INFO L482 AbstractCegarLoop]: Abstraction has 37399 states and 126729 transitions. [2021-06-05 04:19:50,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 37399 states and 126729 transitions. [2021-06-05 04:19:50,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:50,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:50,919 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:51,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21648,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:51,120 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:51,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1250115722, now seen corresponding path program 283 times [2021-06-05 04:19:51,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:51,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397539850] [2021-06-05 04:19:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:51,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:51,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397539850] [2021-06-05 04:19:51,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397539850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:51,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282784268] [2021-06-05 04:19:51,174 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 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 04:19:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:51,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:51,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:51,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282784268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:51,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:51,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:19:51,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846058643] [2021-06-05 04:19:51,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:51,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:51,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:51,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:51,242 INFO L87 Difference]: Start difference. First operand 37399 states and 126729 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:51,625 INFO L93 Difference]: Finished difference Result 46106 states and 155238 transitions. [2021-06-05 04:19:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:19:51,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:51,711 INFO L225 Difference]: With dead ends: 46106 [2021-06-05 04:19:51,711 INFO L226 Difference]: Without dead ends: 46106 [2021-06-05 04:19:51,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=221, Invalid=379, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:19:51,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46106 states. [2021-06-05 04:19:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46106 to 41545. [2021-06-05 04:19:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41545 states, 41544 states have (on average 3.3881667629501253) internal successors, (140758), 41544 states have internal predecessors, (140758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:52,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41545 states to 41545 states and 140758 transitions. [2021-06-05 04:19:52,436 INFO L78 Accepts]: Start accepts. Automaton has 41545 states and 140758 transitions. Word has length 22 [2021-06-05 04:19:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:52,436 INFO L482 AbstractCegarLoop]: Abstraction has 41545 states and 140758 transitions. [2021-06-05 04:19:52,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand 41545 states and 140758 transitions. [2021-06-05 04:19:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:52,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:52,446 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:52,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21649,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:52,646 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:52,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1949569753, now seen corresponding path program 284 times [2021-06-05 04:19:52,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:52,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401064721] [2021-06-05 04:19:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:52,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:52,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401064721] [2021-06-05 04:19:52,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401064721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:52,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200614114] [2021-06-05 04:19:52,708 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 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 04:19:52,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:19:52,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:52,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:52,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200614114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:52,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:52,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:19:52,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821795069] [2021-06-05 04:19:52,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:52,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:52,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:52,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:52,771 INFO L87 Difference]: Start difference. First operand 41545 states and 140758 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:53,064 INFO L93 Difference]: Finished difference Result 46718 states and 157685 transitions. [2021-06-05 04:19:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:19:53,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:53,157 INFO L225 Difference]: With dead ends: 46718 [2021-06-05 04:19:53,157 INFO L226 Difference]: Without dead ends: 46714 [2021-06-05 04:19:53,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:19:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46714 states. [2021-06-05 04:19:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46714 to 41727. [2021-06-05 04:19:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41727 states, 41726 states have (on average 3.388486794804199) internal successors, (141388), 41726 states have internal predecessors, (141388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41727 states to 41727 states and 141388 transitions. [2021-06-05 04:19:54,075 INFO L78 Accepts]: Start accepts. Automaton has 41727 states and 141388 transitions. Word has length 22 [2021-06-05 04:19:54,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:54,075 INFO L482 AbstractCegarLoop]: Abstraction has 41727 states and 141388 transitions. [2021-06-05 04:19:54,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 41727 states and 141388 transitions. [2021-06-05 04:19:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:54,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:54,086 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:54,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21650 [2021-06-05 04:19:54,286 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:54,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1787971300, now seen corresponding path program 285 times [2021-06-05 04:19:54,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:54,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308581040] [2021-06-05 04:19:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:54,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:54,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308581040] [2021-06-05 04:19:54,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308581040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:54,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556728430] [2021-06-05 04:19:54,343 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 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 04:19:54,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:19:54,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:54,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:54,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:54,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556728430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:54,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:54,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:19:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729906797] [2021-06-05 04:19:54,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:54,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:54,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:54,409 INFO L87 Difference]: Start difference. First operand 41727 states and 141388 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:54,651 INFO L93 Difference]: Finished difference Result 45021 states and 151377 transitions. [2021-06-05 04:19:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:19:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:54,743 INFO L225 Difference]: With dead ends: 45021 [2021-06-05 04:19:54,743 INFO L226 Difference]: Without dead ends: 45021 [2021-06-05 04:19:54,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:19:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45021 states. [2021-06-05 04:19:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45021 to 44522. [2021-06-05 04:19:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.3770580175647447) internal successors, (150350), 44521 states have internal predecessors, (150350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 150350 transitions. [2021-06-05 04:19:55,632 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 150350 transitions. Word has length 22 [2021-06-05 04:19:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:55,632 INFO L482 AbstractCegarLoop]: Abstraction has 44522 states and 150350 transitions. [2021-06-05 04:19:55,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 150350 transitions. [2021-06-05 04:19:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:55,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:55,642 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:55,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21651,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:19:55,849 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305955, now seen corresponding path program 286 times [2021-06-05 04:19:55,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:55,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310046184] [2021-06-05 04:19:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:19:55,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310046184] [2021-06-05 04:19:55,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310046184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21510531] [2021-06-05 04:19:55,917 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 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 04:19:55,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:19:55,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:55,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:55,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:19:55,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21510531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:55,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:55,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:19:55,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383972428] [2021-06-05 04:19:55,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:55,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:55,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:55,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:55,977 INFO L87 Difference]: Start difference. First operand 44522 states and 150350 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:56,282 INFO L93 Difference]: Finished difference Result 47600 states and 159895 transitions. [2021-06-05 04:19:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:19:56,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:56,386 INFO L225 Difference]: With dead ends: 47600 [2021-06-05 04:19:56,386 INFO L226 Difference]: Without dead ends: 47595 [2021-06-05 04:19:56,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:19:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47595 states. [2021-06-05 04:19:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47595 to 44534. [2021-06-05 04:19:57,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44534 states, 44533 states have (on average 3.377001324860216) internal successors, (150388), 44533 states have internal predecessors, (150388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44534 states to 44534 states and 150388 transitions. [2021-06-05 04:19:57,363 INFO L78 Accepts]: Start accepts. Automaton has 44534 states and 150388 transitions. Word has length 22 [2021-06-05 04:19:57,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:57,363 INFO L482 AbstractCegarLoop]: Abstraction has 44534 states and 150388 transitions. [2021-06-05 04:19:57,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:57,363 INFO L276 IsEmpty]: Start isEmpty. Operand 44534 states and 150388 transitions. [2021-06-05 04:19:57,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:57,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:57,373 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:57,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21652 [2021-06-05 04:19:57,573 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:57,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1281625034, now seen corresponding path program 287 times [2021-06-05 04:19:57,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:57,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916675433] [2021-06-05 04:19:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:19:57,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916675433] [2021-06-05 04:19:57,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916675433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919375774] [2021-06-05 04:19:57,632 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 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 04:19:57,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:19:57,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:57,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:19:57,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919375774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:57,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:57,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:19:57,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985499165] [2021-06-05 04:19:57,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:19:57,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:19:57,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:19:57,921 INFO L87 Difference]: Start difference. First operand 44534 states and 150388 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:58,158 INFO L93 Difference]: Finished difference Result 45136 states and 151973 transitions. [2021-06-05 04:19:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:19:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 22 [2021-06-05 04:19:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:58,245 INFO L225 Difference]: With dead ends: 45136 [2021-06-05 04:19:58,245 INFO L226 Difference]: Without dead ends: 45136 [2021-06-05 04:19:58,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:19:58,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45136 states. [2021-06-05 04:19:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45136 to 44984. [2021-06-05 04:19:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44984 states, 44983 states have (on average 3.373518884912078) internal successors, (151751), 44983 states have internal predecessors, (151751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:19:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44984 states to 44984 states and 151751 transitions. [2021-06-05 04:19:59,215 INFO L78 Accepts]: Start accepts. Automaton has 44984 states and 151751 transitions. Word has length 22 [2021-06-05 04:19:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:19:59,215 INFO L482 AbstractCegarLoop]: Abstraction has 44984 states and 151751 transitions. [2021-06-05 04:19:59,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 04:19:59,215 INFO L276 IsEmpty]: Start isEmpty. Operand 44984 states and 151751 transitions. [2021-06-05 04:19:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:19:59,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:19:59,225 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:19:59,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21653 [2021-06-05 04:19:59,426 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:19:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:19:59,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1694205095, now seen corresponding path program 288 times [2021-06-05 04:19:59,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:19:59,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311674924] [2021-06-05 04:19:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:19:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:19:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:59,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:19:59,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311674924] [2021-06-05 04:19:59,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311674924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:59,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378600143] [2021-06-05 04:19:59,497 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 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 04:19:59,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:19:59,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:19:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:19:59,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:19:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:19:59,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378600143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:19:59,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:19:59,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:19:59,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298483605] [2021-06-05 04:19:59,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:19:59,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:19:59,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:19:59,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:19:59,559 INFO L87 Difference]: Start difference. First operand 44984 states and 151751 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:19:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:19:59,854 INFO L93 Difference]: Finished difference Result 48063 states and 161244 transitions. [2021-06-05 04:19:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:19:59,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:19:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:19:59,945 INFO L225 Difference]: With dead ends: 48063 [2021-06-05 04:19:59,946 INFO L226 Difference]: Without dead ends: 48057 [2021-06-05 04:19:59,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:19:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48057 states. [2021-06-05 04:20:00,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48057 to 45252. [2021-06-05 04:20:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45252 states, 45251 states have (on average 3.37426797197852) internal successors, (152689), 45251 states have internal predecessors, (152689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45252 states to 45252 states and 152689 transitions. [2021-06-05 04:20:00,926 INFO L78 Accepts]: Start accepts. Automaton has 45252 states and 152689 transitions. Word has length 22 [2021-06-05 04:20:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:00,926 INFO L482 AbstractCegarLoop]: Abstraction has 45252 states and 152689 transitions. [2021-06-05 04:20:00,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 45252 states and 152689 transitions. [2021-06-05 04:20:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:00,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:00,936 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:01,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21654 [2021-06-05 04:20:01,136 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:01,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1530207324, now seen corresponding path program 289 times [2021-06-05 04:20:01,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:01,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849014521] [2021-06-05 04:20:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:01,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:01,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849014521] [2021-06-05 04:20:01,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849014521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:01,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838820116] [2021-06-05 04:20:01,202 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 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 04:20:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:01,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:01,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:01,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838820116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:01,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:01,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:20:01,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393138947] [2021-06-05 04:20:01,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:01,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:01,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:01,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:01,268 INFO L87 Difference]: Start difference. First operand 45252 states and 152689 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:01,556 INFO L93 Difference]: Finished difference Result 45494 states and 153120 transitions. [2021-06-05 04:20:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:20:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:20:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:01,652 INFO L225 Difference]: With dead ends: 45494 [2021-06-05 04:20:01,653 INFO L226 Difference]: Without dead ends: 45494 [2021-06-05 04:20:01,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:20:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45494 states. [2021-06-05 04:20:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45494 to 45247. [2021-06-05 04:20:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45247 states, 45246 states have (on average 3.37428722981037) internal successors, (152673), 45246 states have internal predecessors, (152673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45247 states to 45247 states and 152673 transitions. [2021-06-05 04:20:02,668 INFO L78 Accepts]: Start accepts. Automaton has 45247 states and 152673 transitions. Word has length 22 [2021-06-05 04:20:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:02,669 INFO L482 AbstractCegarLoop]: Abstraction has 45247 states and 152673 transitions. [2021-06-05 04:20:02,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 45247 states and 152673 transitions. [2021-06-05 04:20:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:02,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:02,680 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:02,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21655 [2021-06-05 04:20:02,881 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1755790749, now seen corresponding path program 290 times [2021-06-05 04:20:02,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:02,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153372755] [2021-06-05 04:20:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:02,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:02,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153372755] [2021-06-05 04:20:02,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153372755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:02,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948181] [2021-06-05 04:20:02,954 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 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 04:20:02,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:20:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:02,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:03,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:03,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:03,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:20:03,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750571960] [2021-06-05 04:20:03,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:03,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:03,016 INFO L87 Difference]: Start difference. First operand 45247 states and 152673 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:03,571 INFO L93 Difference]: Finished difference Result 45858 states and 154285 transitions. [2021-06-05 04:20:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:20:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:20:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:03,669 INFO L225 Difference]: With dead ends: 45858 [2021-06-05 04:20:03,669 INFO L226 Difference]: Without dead ends: 45851 [2021-06-05 04:20:03,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:20:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45851 states. [2021-06-05 04:20:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45851 to 45247. [2021-06-05 04:20:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45247 states, 45246 states have (on average 3.374265128409141) internal successors, (152672), 45246 states have internal predecessors, (152672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45247 states to 45247 states and 152672 transitions. [2021-06-05 04:20:04,680 INFO L78 Accepts]: Start accepts. Automaton has 45247 states and 152672 transitions. Word has length 22 [2021-06-05 04:20:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:04,680 INFO L482 AbstractCegarLoop]: Abstraction has 45247 states and 152672 transitions. [2021-06-05 04:20:04,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 45247 states and 152672 transitions. [2021-06-05 04:20:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:04,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:04,690 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:04,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21656 [2021-06-05 04:20:04,891 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1497302794, now seen corresponding path program 291 times [2021-06-05 04:20:04,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:04,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958253253] [2021-06-05 04:20:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:04,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:04,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958253253] [2021-06-05 04:20:04,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958253253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:04,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153971638] [2021-06-05 04:20:04,967 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 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 04:20:04,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:20:04,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:04,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:05,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153971638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:05,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:05,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:20:05,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265321157] [2021-06-05 04:20:05,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:05,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:05,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:05,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:05,044 INFO L87 Difference]: Start difference. First operand 45247 states and 152672 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:05,361 INFO L93 Difference]: Finished difference Result 45606 states and 153527 transitions. [2021-06-05 04:20:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:20:05,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:20:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:05,457 INFO L225 Difference]: With dead ends: 45606 [2021-06-05 04:20:05,457 INFO L226 Difference]: Without dead ends: 45606 [2021-06-05 04:20:05,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:20:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45606 states. [2021-06-05 04:20:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45606 to 45419. [2021-06-05 04:20:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45419 states, 45418 states have (on average 3.3728697873089963) internal successors, (153189), 45418 states have internal predecessors, (153189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45419 states to 45419 states and 153189 transitions. [2021-06-05 04:20:06,460 INFO L78 Accepts]: Start accepts. Automaton has 45419 states and 153189 transitions. Word has length 22 [2021-06-05 04:20:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:06,460 INFO L482 AbstractCegarLoop]: Abstraction has 45419 states and 153189 transitions. [2021-06-05 04:20:06,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 45419 states and 153189 transitions. [2021-06-05 04:20:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:06,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:06,471 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:06,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21657,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:06,672 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:06,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1331479513, now seen corresponding path program 292 times [2021-06-05 04:20:06,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:06,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019599314] [2021-06-05 04:20:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:06,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019599314] [2021-06-05 04:20:06,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019599314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650877097] [2021-06-05 04:20:06,752 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 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 04:20:06,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:20:06,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:06,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:06,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:06,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650877097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:06,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:06,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:20:06,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262559824] [2021-06-05 04:20:06,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:06,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:06,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:06,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:06,829 INFO L87 Difference]: Start difference. First operand 45419 states and 153189 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:07,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:07,206 INFO L93 Difference]: Finished difference Result 46001 states and 154730 transitions. [2021-06-05 04:20:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:20:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:20:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:07,307 INFO L225 Difference]: With dead ends: 46001 [2021-06-05 04:20:07,308 INFO L226 Difference]: Without dead ends: 45993 [2021-06-05 04:20:07,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:20:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45993 states. [2021-06-05 04:20:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45993 to 45419. [2021-06-05 04:20:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45419 states, 45418 states have (on average 3.372847769606764) internal successors, (153188), 45418 states have internal predecessors, (153188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45419 states to 45419 states and 153188 transitions. [2021-06-05 04:20:08,445 INFO L78 Accepts]: Start accepts. Automaton has 45419 states and 153188 transitions. Word has length 22 [2021-06-05 04:20:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:08,445 INFO L482 AbstractCegarLoop]: Abstraction has 45419 states and 153188 transitions. [2021-06-05 04:20:08,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 45419 states and 153188 transitions. [2021-06-05 04:20:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:08,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:08,456 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:08,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21658,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:08,672 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash 860835940, now seen corresponding path program 293 times [2021-06-05 04:20:08,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:08,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895070340] [2021-06-05 04:20:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:08,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895070340] [2021-06-05 04:20:08,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895070340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577707674] [2021-06-05 04:20:08,744 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 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 04:20:08,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:20:08,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:08,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:08,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577707674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:08,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:08,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:20:08,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371429757] [2021-06-05 04:20:08,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:08,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:08,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:08,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:08,811 INFO L87 Difference]: Start difference. First operand 45419 states and 153188 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:09,232 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 04:20:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:09,485 INFO L93 Difference]: Finished difference Result 45708 states and 153807 transitions. [2021-06-05 04:20:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:20:09,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:20:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:09,581 INFO L225 Difference]: With dead ends: 45708 [2021-06-05 04:20:09,581 INFO L226 Difference]: Without dead ends: 45708 [2021-06-05 04:20:09,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:20:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45708 states. [2021-06-05 04:20:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45708 to 45500. [2021-06-05 04:20:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45500 states, 45499 states have (on average 3.372184004044045) internal successors, (153431), 45499 states have internal predecessors, (153431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45500 states to 45500 states and 153431 transitions. [2021-06-05 04:20:10,556 INFO L78 Accepts]: Start accepts. Automaton has 45500 states and 153431 transitions. Word has length 22 [2021-06-05 04:20:10,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:10,556 INFO L482 AbstractCegarLoop]: Abstraction has 45500 states and 153431 transitions. [2021-06-05 04:20:10,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 45500 states and 153431 transitions. [2021-06-05 04:20:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:10,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:10,566 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:10,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21659,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:10,767 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1062733085, now seen corresponding path program 294 times [2021-06-05 04:20:10,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:10,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367025257] [2021-06-05 04:20:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:10,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:10,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367025257] [2021-06-05 04:20:10,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367025257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:10,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849454249] [2021-06-05 04:20:10,855 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 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 04:20:10,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:20:10,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:10,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849454249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:10,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:10,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:20:10,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984005475] [2021-06-05 04:20:10,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:10,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:10,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:10,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:10,919 INFO L87 Difference]: Start difference. First operand 45500 states and 153431 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:11,207 INFO L93 Difference]: Finished difference Result 46053 states and 154900 transitions. [2021-06-05 04:20:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:20:11,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:20:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:11,308 INFO L225 Difference]: With dead ends: 46053 [2021-06-05 04:20:11,309 INFO L226 Difference]: Without dead ends: 46044 [2021-06-05 04:20:11,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:20:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46044 states. [2021-06-05 04:20:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46044 to 45500. [2021-06-05 04:20:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45500 states, 45499 states have (on average 3.372162025539023) internal successors, (153430), 45499 states have internal predecessors, (153430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45500 states to 45500 states and 153430 transitions. [2021-06-05 04:20:12,265 INFO L78 Accepts]: Start accepts. Automaton has 45500 states and 153430 transitions. Word has length 22 [2021-06-05 04:20:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:12,265 INFO L482 AbstractCegarLoop]: Abstraction has 45500 states and 153430 transitions. [2021-06-05 04:20:12,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 45500 states and 153430 transitions. [2021-06-05 04:20:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:12,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:12,276 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:12,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21660 [2021-06-05 04:20:12,476 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1689767350, now seen corresponding path program 295 times [2021-06-05 04:20:12,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:12,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260109561] [2021-06-05 04:20:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:12,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:12,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260109561] [2021-06-05 04:20:12,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260109561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:12,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110164999] [2021-06-05 04:20:12,553 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 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 04:20:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:12,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:12,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110164999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:12,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:12,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:20:12,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239623031] [2021-06-05 04:20:12,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:12,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:12,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:12,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:12,618 INFO L87 Difference]: Start difference. First operand 45500 states and 153430 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:13,100 INFO L93 Difference]: Finished difference Result 45887 states and 154289 transitions. [2021-06-05 04:20:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:20:13,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:20:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:13,191 INFO L225 Difference]: With dead ends: 45887 [2021-06-05 04:20:13,191 INFO L226 Difference]: Without dead ends: 45887 [2021-06-05 04:20:13,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=591, Invalid=1215, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:20:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45887 states. [2021-06-05 04:20:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45887 to 45536. [2021-06-05 04:20:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45536 states, 45535 states have (on average 3.371867794004612) internal successors, (153538), 45535 states have internal predecessors, (153538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45536 states to 45536 states and 153538 transitions. [2021-06-05 04:20:14,360 INFO L78 Accepts]: Start accepts. Automaton has 45536 states and 153538 transitions. Word has length 22 [2021-06-05 04:20:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:14,360 INFO L482 AbstractCegarLoop]: Abstraction has 45536 states and 153538 transitions. [2021-06-05 04:20:14,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 45536 states and 153538 transitions. [2021-06-05 04:20:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:14,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:14,370 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:14,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21661 [2021-06-05 04:20:14,571 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:14,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:14,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1321528409, now seen corresponding path program 296 times [2021-06-05 04:20:14,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:14,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625149908] [2021-06-05 04:20:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:14,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625149908] [2021-06-05 04:20:14,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625149908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:14,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426656038] [2021-06-05 04:20:14,661 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 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 04:20:14,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:20:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:14,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:14,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426656038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:14,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:14,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:20:14,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328676118] [2021-06-05 04:20:14,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:14,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:14,724 INFO L87 Difference]: Start difference. First operand 45536 states and 153538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:15,258 INFO L93 Difference]: Finished difference Result 46048 states and 154924 transitions. [2021-06-05 04:20:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:20:15,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:20:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:15,366 INFO L225 Difference]: With dead ends: 46048 [2021-06-05 04:20:15,366 INFO L226 Difference]: Without dead ends: 46038 [2021-06-05 04:20:15,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:20:15,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46038 states. [2021-06-05 04:20:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46038 to 45536. [2021-06-05 04:20:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45536 states, 45535 states have (on average 3.3718458328758096) internal successors, (153537), 45535 states have internal predecessors, (153537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45536 states to 45536 states and 153537 transitions. [2021-06-05 04:20:16,442 INFO L78 Accepts]: Start accepts. Automaton has 45536 states and 153537 transitions. Word has length 22 [2021-06-05 04:20:16,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:16,442 INFO L482 AbstractCegarLoop]: Abstraction has 45536 states and 153537 transitions. [2021-06-05 04:20:16,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 45536 states and 153537 transitions. [2021-06-05 04:20:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:16,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:16,452 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:16,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21662 [2021-06-05 04:20:16,653 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 845909284, now seen corresponding path program 297 times [2021-06-05 04:20:16,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:16,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143329623] [2021-06-05 04:20:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:16,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:16,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143329623] [2021-06-05 04:20:16,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143329623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:16,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528764165] [2021-06-05 04:20:16,755 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 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 04:20:16,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:20:16,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:16,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:16,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:16,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528764165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:16,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:16,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:20:16,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730203701] [2021-06-05 04:20:16,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:16,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:16,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:16,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:16,826 INFO L87 Difference]: Start difference. First operand 45536 states and 153537 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:17,329 INFO L93 Difference]: Finished difference Result 46288 states and 155435 transitions. [2021-06-05 04:20:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:20:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 22 [2021-06-05 04:20:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:17,426 INFO L225 Difference]: With dead ends: 46288 [2021-06-05 04:20:17,426 INFO L226 Difference]: Without dead ends: 46288 [2021-06-05 04:20:17,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:20:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46288 states. [2021-06-05 04:20:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46288 to 45559. [2021-06-05 04:20:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45559 states, 45558 states have (on average 3.371658106150402) internal successors, (153606), 45558 states have internal predecessors, (153606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45559 states to 45559 states and 153606 transitions. [2021-06-05 04:20:18,397 INFO L78 Accepts]: Start accepts. Automaton has 45559 states and 153606 transitions. Word has length 22 [2021-06-05 04:20:18,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:18,397 INFO L482 AbstractCegarLoop]: Abstraction has 45559 states and 153606 transitions. [2021-06-05 04:20:18,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 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 04:20:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 45559 states and 153606 transitions. [2021-06-05 04:20:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:18,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:18,408 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:18,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21663,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:18,617 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:18,617 INFO L82 PathProgramCache]: Analyzing trace with hash -141325697, now seen corresponding path program 298 times [2021-06-05 04:20:18,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:18,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381541972] [2021-06-05 04:20:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:18,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:18,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381541972] [2021-06-05 04:20:18,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381541972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:18,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296985993] [2021-06-05 04:20:18,691 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 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 04:20:18,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:20:18,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:18,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296985993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:18,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:18,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 04:20:18,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897098676] [2021-06-05 04:20:18,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:18,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:18,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:18,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:18,755 INFO L87 Difference]: Start difference. First operand 45559 states and 153606 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 04:20:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:19,031 INFO L93 Difference]: Finished difference Result 45869 states and 154129 transitions. [2021-06-05 04:20:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:20:19,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-06-05 04:20:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:19,125 INFO L225 Difference]: With dead ends: 45869 [2021-06-05 04:20:19,125 INFO L226 Difference]: Without dead ends: 45869 [2021-06-05 04:20:19,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:20:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45869 states. [2021-06-05 04:20:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45869 to 45461. [2021-06-05 04:20:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45461 states, 45460 states have (on average 3.3717553893532775) internal successors, (153280), 45460 states have internal predecessors, (153280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45461 states to 45461 states and 153280 transitions. [2021-06-05 04:20:20,213 INFO L78 Accepts]: Start accepts. Automaton has 45461 states and 153280 transitions. Word has length 22 [2021-06-05 04:20:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:20,213 INFO L482 AbstractCegarLoop]: Abstraction has 45461 states and 153280 transitions. [2021-06-05 04:20:20,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 04:20:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 45461 states and 153280 transitions. [2021-06-05 04:20:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:20,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:20,223 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:20,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21664 [2021-06-05 04:20:20,424 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:20,424 INFO L82 PathProgramCache]: Analyzing trace with hash -919069942, now seen corresponding path program 299 times [2021-06-05 04:20:20,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:20,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293178084] [2021-06-05 04:20:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:20,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:20,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293178084] [2021-06-05 04:20:20,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293178084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:20,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023295556] [2021-06-05 04:20:20,513 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 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 04:20:20,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:20:20,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:20,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:20,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:20,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023295556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:20,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:20,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 04:20:20,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558300244] [2021-06-05 04:20:20,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:20:20,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:20:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:20,588 INFO L87 Difference]: Start difference. First operand 45461 states and 153280 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 04:20:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:21,149 INFO L93 Difference]: Finished difference Result 45757 states and 153693 transitions. [2021-06-05 04:20:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:20:21,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-06-05 04:20:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:21,230 INFO L225 Difference]: With dead ends: 45757 [2021-06-05 04:20:21,230 INFO L226 Difference]: Without dead ends: 45753 [2021-06-05 04:20:21,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:20:21,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45753 states. [2021-06-05 04:20:21,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45753 to 45416. [2021-06-05 04:20:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45416 states, 45415 states have (on average 3.3715952879004734) internal successors, (153121), 45415 states have internal predecessors, (153121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45416 states to 45416 states and 153121 transitions. [2021-06-05 04:20:22,234 INFO L78 Accepts]: Start accepts. Automaton has 45416 states and 153121 transitions. Word has length 22 [2021-06-05 04:20:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:22,234 INFO L482 AbstractCegarLoop]: Abstraction has 45416 states and 153121 transitions. [2021-06-05 04:20:22,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 04:20:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 45416 states and 153121 transitions. [2021-06-05 04:20:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:22,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:22,244 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:22,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21665,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:22,444 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:22,445 INFO L82 PathProgramCache]: Analyzing trace with hash 931954525, now seen corresponding path program 300 times [2021-06-05 04:20:22,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:22,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285421792] [2021-06-05 04:20:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:22,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:22,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285421792] [2021-06-05 04:20:22,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285421792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:22,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033414475] [2021-06-05 04:20:22,520 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 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 04:20:22,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:20:22,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:22,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:22,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033414475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:22,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:22,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:22,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125844836] [2021-06-05 04:20:22,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:22,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:22,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:22,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:22,591 INFO L87 Difference]: Start difference. First operand 45416 states and 153121 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:20:22,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:22,920 INFO L93 Difference]: Finished difference Result 45997 states and 154677 transitions. [2021-06-05 04:20:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:20:22,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 04:20:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:23,009 INFO L225 Difference]: With dead ends: 45997 [2021-06-05 04:20:23,009 INFO L226 Difference]: Without dead ends: 45990 [2021-06-05 04:20:23,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:20:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45990 states. [2021-06-05 04:20:23,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45990 to 45416. [2021-06-05 04:20:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45416 states, 45415 states have (on average 3.371573268743807) internal successors, (153120), 45415 states have internal predecessors, (153120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45416 states to 45416 states and 153120 transitions. [2021-06-05 04:20:23,962 INFO L78 Accepts]: Start accepts. Automaton has 45416 states and 153120 transitions. Word has length 22 [2021-06-05 04:20:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:23,962 INFO L482 AbstractCegarLoop]: Abstraction has 45416 states and 153120 transitions. [2021-06-05 04:20:23,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:20:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 45416 states and 153120 transitions. [2021-06-05 04:20:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:23,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:23,973 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:24,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21666 [2021-06-05 04:20:24,185 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash 673466570, now seen corresponding path program 301 times [2021-06-05 04:20:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:24,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192474695] [2021-06-05 04:20:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:24,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:24,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192474695] [2021-06-05 04:20:24,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192474695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:24,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554131430] [2021-06-05 04:20:24,264 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 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 04:20:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:24,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:24,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:24,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554131430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:24,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:24,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:24,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405788672] [2021-06-05 04:20:24,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:24,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:24,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:24,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:24,338 INFO L87 Difference]: Start difference. First operand 45416 states and 153120 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:20:24,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:24,962 INFO L93 Difference]: Finished difference Result 53135 states and 176578 transitions. [2021-06-05 04:20:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 04:20:24,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 04:20:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:25,094 INFO L225 Difference]: With dead ends: 53135 [2021-06-05 04:20:25,094 INFO L226 Difference]: Without dead ends: 53135 [2021-06-05 04:20:25,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=924, Invalid=1832, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 04:20:25,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53135 states. [2021-06-05 04:20:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53135 to 47539. [2021-06-05 04:20:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47539 states, 47538 states have (on average 3.3566199671841472) internal successors, (159567), 47538 states have internal predecessors, (159567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47539 states to 47539 states and 159567 transitions. [2021-06-05 04:20:26,264 INFO L78 Accepts]: Start accepts. Automaton has 47539 states and 159567 transitions. Word has length 22 [2021-06-05 04:20:26,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:26,264 INFO L482 AbstractCegarLoop]: Abstraction has 47539 states and 159567 transitions. [2021-06-05 04:20:26,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:20:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 47539 states and 159567 transitions. [2021-06-05 04:20:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:26,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:26,275 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:26,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21667,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:26,476 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:26,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1618648765, now seen corresponding path program 302 times [2021-06-05 04:20:26,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:26,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457258508] [2021-06-05 04:20:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:26,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457258508] [2021-06-05 04:20:26,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457258508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411667819] [2021-06-05 04:20:26,559 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 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 04:20:26,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:20:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:26,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:26,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411667819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:26,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:26,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:26,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620893612] [2021-06-05 04:20:26,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:26,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:26,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:26,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:26,631 INFO L87 Difference]: Start difference. First operand 47539 states and 159567 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:20:27,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:27,135 INFO L93 Difference]: Finished difference Result 48476 states and 162116 transitions. [2021-06-05 04:20:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:20:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 04:20:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:27,228 INFO L225 Difference]: With dead ends: 48476 [2021-06-05 04:20:27,229 INFO L226 Difference]: Without dead ends: 48469 [2021-06-05 04:20:27,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:20:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48469 states. [2021-06-05 04:20:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48469 to 47569. [2021-06-05 04:20:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47569 states, 47568 states have (on average 3.3566473259334004) internal successors, (159669), 47568 states have internal predecessors, (159669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47569 states to 47569 states and 159669 transitions. [2021-06-05 04:20:28,327 INFO L78 Accepts]: Start accepts. Automaton has 47569 states and 159669 transitions. Word has length 22 [2021-06-05 04:20:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:28,327 INFO L482 AbstractCegarLoop]: Abstraction has 47569 states and 159669 transitions. [2021-06-05 04:20:28,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:20:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 47569 states and 159669 transitions. [2021-06-05 04:20:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:28,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:28,338 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:28,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21668,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:28,539 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:28,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1877136720, now seen corresponding path program 303 times [2021-06-05 04:20:28,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:28,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114969161] [2021-06-05 04:20:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:28,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:28,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114969161] [2021-06-05 04:20:28,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114969161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:28,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401579586] [2021-06-05 04:20:28,615 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 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 04:20:28,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:20:28,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:28,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:28,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:28,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401579586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:28,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:28,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:28,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946678262] [2021-06-05 04:20:28,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:28,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:28,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:28,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:28,692 INFO L87 Difference]: Start difference. First operand 47569 states and 159669 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:20:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:29,283 INFO L93 Difference]: Finished difference Result 49325 states and 164443 transitions. [2021-06-05 04:20:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:20:29,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 04:20:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:29,386 INFO L225 Difference]: With dead ends: 49325 [2021-06-05 04:20:29,386 INFO L226 Difference]: Without dead ends: 49325 [2021-06-05 04:20:29,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=862, Invalid=1688, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 04:20:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49325 states. [2021-06-05 04:20:30,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49325 to 47248. [2021-06-05 04:20:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47248 states, 47247 states have (on average 3.3590915825343406) internal successors, (158707), 47247 states have internal predecessors, (158707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47248 states to 47248 states and 158707 transitions. [2021-06-05 04:20:30,375 INFO L78 Accepts]: Start accepts. Automaton has 47248 states and 158707 transitions. Word has length 22 [2021-06-05 04:20:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:30,375 INFO L482 AbstractCegarLoop]: Abstraction has 47248 states and 158707 transitions. [2021-06-05 04:20:30,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:20:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 47248 states and 158707 transitions. [2021-06-05 04:20:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:30,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:30,385 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:30,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21669 [2021-06-05 04:20:30,586 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2042960001, now seen corresponding path program 304 times [2021-06-05 04:20:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:30,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629321733] [2021-06-05 04:20:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:30,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:30,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629321733] [2021-06-05 04:20:30,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629321733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:30,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103058383] [2021-06-05 04:20:30,663 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 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 04:20:30,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:20:30,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:30,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:30,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103058383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:30,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:30,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:30,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240620938] [2021-06-05 04:20:30,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:30,731 INFO L87 Difference]: Start difference. First operand 47248 states and 158707 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:20:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:31,018 INFO L93 Difference]: Finished difference Result 47656 states and 159788 transitions. [2021-06-05 04:20:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:20:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 04:20:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:31,107 INFO L225 Difference]: With dead ends: 47656 [2021-06-05 04:20:31,108 INFO L226 Difference]: Without dead ends: 47648 [2021-06-05 04:20:31,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:20:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47648 states. [2021-06-05 04:20:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47648 to 47248. [2021-06-05 04:20:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47248 states, 47247 states have (on average 3.359070417169344) internal successors, (158706), 47247 states have internal predecessors, (158706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47248 states to 47248 states and 158706 transitions. [2021-06-05 04:20:32,090 INFO L78 Accepts]: Start accepts. Automaton has 47248 states and 158706 transitions. Word has length 22 [2021-06-05 04:20:32,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:32,091 INFO L482 AbstractCegarLoop]: Abstraction has 47248 states and 158706 transitions. [2021-06-05 04:20:32,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:20:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand 47248 states and 158706 transitions. [2021-06-05 04:20:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:32,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:32,101 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:32,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21670,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:32,302 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1781363722, now seen corresponding path program 305 times [2021-06-05 04:20:32,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:32,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173237389] [2021-06-05 04:20:32,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:32,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:32,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173237389] [2021-06-05 04:20:32,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173237389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:32,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878035491] [2021-06-05 04:20:32,387 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 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 04:20:32,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:20:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:32,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878035491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:32,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:32,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:32,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186212717] [2021-06-05 04:20:32,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:32,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:32,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:32,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:32,677 INFO L87 Difference]: Start difference. First operand 47248 states and 158706 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:20:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:33,288 INFO L93 Difference]: Finished difference Result 49120 states and 163790 transitions. [2021-06-05 04:20:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 04:20:33,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 04:20:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:33,382 INFO L225 Difference]: With dead ends: 49120 [2021-06-05 04:20:33,382 INFO L226 Difference]: Without dead ends: 49120 [2021-06-05 04:20:33,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 611.8ms TimeCoverageRelationStatistics Valid=1014, Invalid=2066, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 04:20:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49120 states. [2021-06-05 04:20:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49120 to 47283. [2021-06-05 04:20:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47283 states, 47282 states have (on average 3.3595448585085235) internal successors, (158846), 47282 states have internal predecessors, (158846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47283 states to 47283 states and 158846 transitions. [2021-06-05 04:20:34,343 INFO L78 Accepts]: Start accepts. Automaton has 47283 states and 158846 transitions. Word has length 22 [2021-06-05 04:20:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:34,343 INFO L482 AbstractCegarLoop]: Abstraction has 47283 states and 158846 transitions. [2021-06-05 04:20:34,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:20:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 47283 states and 158846 transitions. [2021-06-05 04:20:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:34,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:34,354 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:34,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21671 [2021-06-05 04:20:34,554 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash 917027869, now seen corresponding path program 306 times [2021-06-05 04:20:34,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:34,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113549676] [2021-06-05 04:20:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:34,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:34,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113549676] [2021-06-05 04:20:34,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113549676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:34,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435517267] [2021-06-05 04:20:34,627 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 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 04:20:34,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:20:34,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:34,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435517267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:34,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:34,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:34,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701706155] [2021-06-05 04:20:34,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:34,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:34,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:34,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:34,699 INFO L87 Difference]: Start difference. First operand 47283 states and 158846 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:20:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:35,037 INFO L93 Difference]: Finished difference Result 48602 states and 162549 transitions. [2021-06-05 04:20:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:20:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 04:20:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:35,140 INFO L225 Difference]: With dead ends: 48602 [2021-06-05 04:20:35,140 INFO L226 Difference]: Without dead ends: 48595 [2021-06-05 04:20:35,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:20:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48595 states. [2021-06-05 04:20:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48595 to 47301. [2021-06-05 04:20:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47301 states, 47300 states have (on average 3.3595771670190273) internal successors, (158908), 47300 states have internal predecessors, (158908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47301 states to 47301 states and 158908 transitions. [2021-06-05 04:20:36,241 INFO L78 Accepts]: Start accepts. Automaton has 47301 states and 158908 transitions. Word has length 22 [2021-06-05 04:20:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:36,241 INFO L482 AbstractCegarLoop]: Abstraction has 47301 states and 158908 transitions. [2021-06-05 04:20:36,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:20:36,241 INFO L276 IsEmpty]: Start isEmpty. Operand 47301 states and 158908 transitions. [2021-06-05 04:20:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:36,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:36,253 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:36,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21672,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:36,453 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:36,454 INFO L82 PathProgramCache]: Analyzing trace with hash 658539914, now seen corresponding path program 307 times [2021-06-05 04:20:36,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:36,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942732487] [2021-06-05 04:20:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:36,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:36,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942732487] [2021-06-05 04:20:36,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942732487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:36,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378416786] [2021-06-05 04:20:36,529 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 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 04:20:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:36,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:36,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378416786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:36,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:36,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:36,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44231435] [2021-06-05 04:20:36,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:36,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:36,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:36,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:36,607 INFO L87 Difference]: Start difference. First operand 47301 states and 158908 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:20:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:37,357 INFO L93 Difference]: Finished difference Result 47967 states and 160441 transitions. [2021-06-05 04:20:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:20:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 04:20:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:37,449 INFO L225 Difference]: With dead ends: 47967 [2021-06-05 04:20:37,449 INFO L226 Difference]: Without dead ends: 47967 [2021-06-05 04:20:37,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=765, Invalid=1491, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:20:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47967 states. [2021-06-05 04:20:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47967 to 47235. [2021-06-05 04:20:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47235 states, 47234 states have (on average 3.360291315577762) internal successors, (158720), 47234 states have internal predecessors, (158720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47235 states to 47235 states and 158720 transitions. [2021-06-05 04:20:38,248 INFO L78 Accepts]: Start accepts. Automaton has 47235 states and 158720 transitions. Word has length 22 [2021-06-05 04:20:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:38,248 INFO L482 AbstractCegarLoop]: Abstraction has 47235 states and 158720 transitions. [2021-06-05 04:20:38,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:20:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 47235 states and 158720 transitions. [2021-06-05 04:20:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:38,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:38,441 INFO L521 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:38,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21673 [2021-06-05 04:20:38,641 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash 492716633, now seen corresponding path program 308 times [2021-06-05 04:20:38,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:38,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67846778] [2021-06-05 04:20:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:38,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:38,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67846778] [2021-06-05 04:20:38,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67846778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:38,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149269764] [2021-06-05 04:20:38,722 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 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 04:20:38,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:20:38,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:38,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:38,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:38,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149269764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:38,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:38,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:38,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896118685] [2021-06-05 04:20:38,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:38,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:38,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:38,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:38,801 INFO L87 Difference]: Start difference. First operand 47235 states and 158720 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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 04:20:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:39,110 INFO L93 Difference]: Finished difference Result 47714 states and 159972 transitions. [2021-06-05 04:20:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:20:39,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 22 [2021-06-05 04:20:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:39,207 INFO L225 Difference]: With dead ends: 47714 [2021-06-05 04:20:39,208 INFO L226 Difference]: Without dead ends: 47706 [2021-06-05 04:20:39,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:20:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47706 states. [2021-06-05 04:20:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47706 to 47235. [2021-06-05 04:20:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47235 states, 47234 states have (on average 3.3602701443875174) internal successors, (158719), 47234 states have internal predecessors, (158719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47235 states to 47235 states and 158719 transitions. [2021-06-05 04:20:40,176 INFO L78 Accepts]: Start accepts. Automaton has 47235 states and 158719 transitions. Word has length 22 [2021-06-05 04:20:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:40,177 INFO L482 AbstractCegarLoop]: Abstraction has 47235 states and 158719 transitions. [2021-06-05 04:20:40,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) 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 04:20:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 47235 states and 158719 transitions. [2021-06-05 04:20:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:40,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:40,188 INFO L521 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:40,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21674 [2021-06-05 04:20:40,388 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:40,388 INFO L82 PathProgramCache]: Analyzing trace with hash 22073060, now seen corresponding path program 309 times [2021-06-05 04:20:40,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:40,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243581479] [2021-06-05 04:20:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:40,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:40,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243581479] [2021-06-05 04:20:40,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243581479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:40,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267021475] [2021-06-05 04:20:40,467 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 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 04:20:40,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:20:40,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:20:40,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:40,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267021475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:40,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:40,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:20:40,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86879300] [2021-06-05 04:20:40,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:20:40,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:40,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:20:40,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:20:40,545 INFO L87 Difference]: Start difference. First operand 47235 states and 158719 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) Received shutdown request... [2021-06-05 04:20:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:20:40,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21675 [2021-06-05 04:20:40,877 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:20:40,878 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:20:40,880 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:20:40,880 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:20:40 BasicIcfg [2021-06-05 04:20:40,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:20:40,880 INFO L168 Benchmark]: Toolchain (without parser) took 893183.92 ms. Allocated memory was 390.1 MB in the beginning and 15.3 GB in the end (delta: 14.9 GB). Free memory was 369.7 MB in the beginning and 8.6 GB in the end (delta: -8.2 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-06-05 04:20:40,880 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 390.1 MB. Free memory is still 370.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:20:40,881 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.50 ms. Allocated memory is still 390.1 MB. Free memory was 369.6 MB in the beginning and 368.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:20:40,881 INFO L168 Benchmark]: Boogie Preprocessor took 13.11 ms. Allocated memory is still 390.1 MB. Free memory was 368.2 MB in the beginning and 367.3 MB in the end (delta: 944.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:20:40,881 INFO L168 Benchmark]: RCFGBuilder took 312.54 ms. Allocated memory is still 390.1 MB. Free memory was 367.2 MB in the beginning and 350.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 04:20:40,881 INFO L168 Benchmark]: TraceAbstraction took 892834.67 ms. Allocated memory was 390.1 MB in the beginning and 15.3 GB in the end (delta: 14.9 GB). Free memory was 349.6 MB in the beginning and 8.6 GB in the end (delta: -8.3 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-06-05 04:20:40,881 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 0.11 ms. Allocated memory is still 390.1 MB. Free memory is still 370.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.50 ms. Allocated memory is still 390.1 MB. Free memory was 369.6 MB in the beginning and 368.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.11 ms. Allocated memory is still 390.1 MB. Free memory was 368.2 MB in the beginning and 367.3 MB in the end (delta: 944.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 312.54 ms. Allocated memory is still 390.1 MB. Free memory was 367.2 MB in the beginning and 350.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 892834.67 ms. Allocated memory was 390.1 MB in the beginning and 15.3 GB in the end (delta: 14.9 GB). Free memory was 349.6 MB in the beginning and 8.6 GB in the end (delta: -8.3 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 54]: 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 (47235states) and FLOYD_HOARE automaton (currently 19 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 30 known predicates. - TimeoutResultAtElement [Line: 54]: 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 (47235states) and FLOYD_HOARE automaton (currently 19 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 30 known predicates. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (47235states) and FLOYD_HOARE automaton (currently 19 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 30 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 892778.8ms, OverallIterations: 313, TraceHistogramMax: 11, EmptinessCheckTime: 2010.9ms, AutomataDifference: 82399.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6581 SDtfs, 26046 SDslu, 40047 SDs, 0 SdLazy, 45545 SolverSat, 8134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17968.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13456 GetRequests, 6021 SyntacticMatches, 147 SemanticMatches, 7287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46976 ImplicationChecksByTransitivity, 41343.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51187occurred in iteration=151, InterpolantAutomatonStates: 6628, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 116651.5ms AutomataMinimizationTime, 312 MinimizatonAttempts, 304232 StatesRemovedByMinimization, 305 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1028.6ms SsaConstructionTime, 3153.2ms SatisfiabilityAnalysisTime, 618103.6ms InterpolantComputationTime, 12823 NumberOfCodeBlocks, 12822 NumberOfCodeBlocksAsserted, 1421 NumberOfCheckSat, 12200 ConstructedInterpolants, 0 QuantifiedInterpolants, 53878 SizeOfPredicates, 192 NumberOfNonLiveVariables, 26090 ConjunctsInSsa, 4500 ConjunctsInUnsatCore, 623 InterpolantComputations, 3 PerfectInterpolantSequences, 11722/34126 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