/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/chl/array-int-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:44:51,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:44:51,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:44:51,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:44:51,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 20:44:51,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 20:44:51,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 20:44:51,606 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 [2021-05-21 20:44:51,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:44:51,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:44:51,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:44:51,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:44:51,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:44:51,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:44:51,636 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:44:51,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:44:51,636 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:44:51,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:44:51,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:44:51,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:44:51,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:44:51,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:44:51,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:44:51,637 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:44:51,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:44:51,638 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:44:51,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:44:51,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:44:51,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:44:51,638 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:44:51,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:44:51,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:44:51,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:44:51,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:44:51,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:44:51,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:44:51,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:44:51,639 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:44:51,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:44:51,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:44:51,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:44:51,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:44:51,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:44:51,900 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:44:51,900 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:44:51,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl [2021-05-21 20:44:52,126 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl' [2021-05-21 20:44:52,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:44:52,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:44:52,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:44:52,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:44:52,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:44:52,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/1) ... [2021-05-21 20:44:52,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/1) ... [2021-05-21 20:44:52,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:44:52,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:44:52,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:44:52,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:44:52,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/1) ... [2021-05-21 20:44:52,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/1) ... [2021-05-21 20:44:52,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/1) ... [2021-05-21 20:44:52,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/1) ... [2021-05-21 20:44:52,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/1) ... [2021-05-21 20:44:52,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/1) ... [2021-05-21 20:44:52,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/1) ... [2021-05-21 20:44:52,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:44:52,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:44:52,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:44:52,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:44:52,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (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 [2021-05-21 20:44:52,285 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:44:52,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:44:52,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:44:52,285 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:44:52,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:44:52,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:44:52,285 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:44:52,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:44:52,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:44:52,286 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:44:52,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:44:52,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:44:52,286 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:44:52,543 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:44:52,543 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-21 20:44:52,544 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-21 20:44:52,544 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-21 20:44:52,544 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-05-21 20:44:52,545 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:44:52 BoogieIcfgContainer [2021-05-21 20:44:52,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:44:52,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:44:52,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:44:52,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:44:52,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:44:52" (1/2) ... [2021-05-21 20:44:52,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c131149 and model type array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:44:52, skipping insertion in model container [2021-05-21 20:44:52,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:44:52" (2/2) ... [2021-05-21 20:44:52,550 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-trans.wvr.bpl [2021-05-21 20:44:52,553 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:44:52,553 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:44:52,553 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:44:52,553 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:44:52,574 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 20:44:52,586 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 20:44:52,598 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:44:52,598 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:44:52,598 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:44:52,598 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:44:52,598 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:44:52,598 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:44:52,598 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:44:52,598 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:44:52,603 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-05-21 20:44:52,612 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:52,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:44:52,617 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:52,618 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:52,618 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2084068600, now seen corresponding path program 1 times [2021-05-21 20:44:52,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:52,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55440708] [2021-05-21 20:44:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:52,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:52,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55440708] [2021-05-21 20:44:52,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55440708] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:52,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:52,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:44:52,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676667169] [2021-05-21 20:44:52,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:44:52,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:44:52,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:44:52,734 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:52,812 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-05-21 20:44:52,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:44:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) 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 14 [2021-05-21 20:44:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:52,820 INFO L225 Difference]: With dead ends: 139 [2021-05-21 20:44:52,820 INFO L226 Difference]: Without dead ends: 135 [2021-05-21 20:44:52,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-21 20:44:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-05-21 20:44:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.819277108433735) internal successors, (234), 83 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-05-21 20:44:52,847 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-05-21 20:44:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:52,847 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-05-21 20:44:52,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-05-21 20:44:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:44:52,848 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:52,849 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:52,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:44:52,849 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:52,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1063669592, now seen corresponding path program 2 times [2021-05-21 20:44:52,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:52,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915343105] [2021-05-21 20:44:52,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:52,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:52,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915343105] [2021-05-21 20:44:52,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915343105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:52,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:52,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:44:52,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436226162] [2021-05-21 20:44:52,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:44:52,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:44:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:44:52,882 INFO L87 Difference]: Start difference. First operand 84 states and 234 transitions. Second operand has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:52,945 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-05-21 20:44:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:44:52,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) 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 14 [2021-05-21 20:44:52,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:52,947 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:44:52,947 INFO L226 Difference]: Without dead ends: 152 [2021-05-21 20:44:52,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-21 20:44:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-05-21 20:44:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.831460674157303) internal successors, (252), 89 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-05-21 20:44:52,954 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-05-21 20:44:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:52,955 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-05-21 20:44:52,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-05-21 20:44:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:44:52,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:52,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:52,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:44:52,956 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:52,956 INFO L82 PathProgramCache]: Analyzing trace with hash 284971666, now seen corresponding path program 3 times [2021-05-21 20:44:52,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:52,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847425419] [2021-05-21 20:44:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:52,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:52,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847425419] [2021-05-21 20:44:52,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847425419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:52,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:52,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:44:52,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418162859] [2021-05-21 20:44:52,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:44:52,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:52,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:44:52,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:44:52,985 INFO L87 Difference]: Start difference. First operand 90 states and 252 transitions. Second operand has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:53,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:53,045 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-05-21 20:44:53,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:44:53,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) 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 14 [2021-05-21 20:44:53,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:53,047 INFO L225 Difference]: With dead ends: 169 [2021-05-21 20:44:53,047 INFO L226 Difference]: Without dead ends: 165 [2021-05-21 20:44:53,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-21 20:44:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-05-21 20:44:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.838709677419355) internal successors, (264), 93 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-05-21 20:44:53,053 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-05-21 20:44:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:53,053 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-05-21 20:44:53,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-05-21 20:44:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:44:53,054 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:53,054 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:53,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:44:53,054 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:53,055 INFO L82 PathProgramCache]: Analyzing trace with hash -791726200, now seen corresponding path program 4 times [2021-05-21 20:44:53,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:53,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012584738] [2021-05-21 20:44:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:53,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:53,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012584738] [2021-05-21 20:44:53,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012584738] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:53,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:53,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:44:53,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593881848] [2021-05-21 20:44:53,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:44:53,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:53,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:44:53,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:44:53,095 INFO L87 Difference]: Start difference. First operand 94 states and 264 transitions. Second operand has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:53,162 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-05-21 20:44:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:44:53,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) 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 14 [2021-05-21 20:44:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:53,165 INFO L225 Difference]: With dead ends: 173 [2021-05-21 20:44:53,165 INFO L226 Difference]: Without dead ends: 169 [2021-05-21 20:44:53,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-21 20:44:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-05-21 20:44:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.845360824742268) internal successors, (276), 97 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-05-21 20:44:53,178 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-05-21 20:44:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:53,178 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-05-21 20:44:53,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-05-21 20:44:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:44:53,181 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:53,181 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:53,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:44:53,182 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:53,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1403359368, now seen corresponding path program 5 times [2021-05-21 20:44:53,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:53,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368109074] [2021-05-21 20:44:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:53,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:53,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368109074] [2021-05-21 20:44:53,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368109074] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:53,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:53,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:44:53,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057810570] [2021-05-21 20:44:53,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:44:53,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:44:53,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:44:53,219 INFO L87 Difference]: Start difference. First operand 98 states and 276 transitions. Second operand has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:53,274 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-05-21 20:44:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:44:53,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) 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 14 [2021-05-21 20:44:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:53,275 INFO L225 Difference]: With dead ends: 176 [2021-05-21 20:44:53,275 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:44:53,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:44:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-05-21 20:44:53,279 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) [2021-05-21 20:44:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-05-21 20:44:53,279 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-05-21 20:44:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:53,279 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-05-21 20:44:53,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-05-21 20:44:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:44:53,280 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:53,280 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:53,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:44:53,280 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:53,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1756874686, now seen corresponding path program 6 times [2021-05-21 20:44:53,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:53,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693216893] [2021-05-21 20:44:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:53,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:53,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693216893] [2021-05-21 20:44:53,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693216893] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:44:53,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:44:53,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:44:53,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710022603] [2021-05-21 20:44:53,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:44:53,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:44:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:44:53,304 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:53,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:53,362 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-05-21 20:44:53,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:44:53,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) 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 14 [2021-05-21 20:44:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:53,363 INFO L225 Difference]: With dead ends: 174 [2021-05-21 20:44:53,363 INFO L226 Difference]: Without dead ends: 170 [2021-05-21 20:44:53,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:44:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-21 20:44:53,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-05-21 20:44:53,367 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) [2021-05-21 20:44:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-05-21 20:44:53,367 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-05-21 20:44:53,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:53,367 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-05-21 20:44:53,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) 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) [2021-05-21 20:44:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-05-21 20:44:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:53,368 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:53,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:53,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 20:44:53,368 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1483038554, now seen corresponding path program 1 times [2021-05-21 20:44:53,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:53,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968806984] [2021-05-21 20:44:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:53,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:53,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968806984] [2021-05-21 20:44:53,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968806984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:53,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501886516] [2021-05-21 20:44:53,449 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 [2021-05-21 20:44:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:53,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:53,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501886516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:53,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:53,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 20:44:53,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401552248] [2021-05-21 20:44:53,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:44:53,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:53,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:44:53,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:44:53,661 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:53,754 INFO L93 Difference]: Finished difference Result 179 states and 476 transitions. [2021-05-21 20:44:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:44:53,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:44:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:53,755 INFO L225 Difference]: With dead ends: 179 [2021-05-21 20:44:53,755 INFO L226 Difference]: Without dead ends: 157 [2021-05-21 20:44:53,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-21 20:44:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-05-21 20:44:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.8214285714285716) internal successors, (316), 112 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 316 transitions. [2021-05-21 20:44:53,764 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 316 transitions. Word has length 15 [2021-05-21 20:44:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:53,764 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 316 transitions. [2021-05-21 20:44:53,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 316 transitions. [2021-05-21 20:44:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:53,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:53,765 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:53,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-21 20:44:53,978 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:53,978 INFO L82 PathProgramCache]: Analyzing trace with hash -180956976, now seen corresponding path program 1 times [2021-05-21 20:44:53,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:53,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390826361] [2021-05-21 20:44:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:54,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:54,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390826361] [2021-05-21 20:44:54,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390826361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:54,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637543891] [2021-05-21 20:44:54,038 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 [2021-05-21 20:44:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:54,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:44:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:54,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637543891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:54,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:54,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:54,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489271354] [2021-05-21 20:44:54,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:54,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:54,200 INFO L87 Difference]: Start difference. First operand 113 states and 316 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:54,312 INFO L93 Difference]: Finished difference Result 173 states and 446 transitions. [2021-05-21 20:44:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:44:54,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:54,314 INFO L225 Difference]: With dead ends: 173 [2021-05-21 20:44:54,314 INFO L226 Difference]: Without dead ends: 150 [2021-05-21 20:44:54,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-21 20:44:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2021-05-21 20:44:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.8073394495412844) internal successors, (306), 109 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 306 transitions. [2021-05-21 20:44:54,318 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 306 transitions. Word has length 15 [2021-05-21 20:44:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:54,318 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 306 transitions. [2021-05-21 20:44:54,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 306 transitions. [2021-05-21 20:44:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:54,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:54,318 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:54,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:54,529 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1385320832, now seen corresponding path program 2 times [2021-05-21 20:44:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:54,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905555119] [2021-05-21 20:44:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:54,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:54,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905555119] [2021-05-21 20:44:54,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905555119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:54,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795796684] [2021-05-21 20:44:54,592 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 [2021-05-21 20:44:54,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:54,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:54,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:44:54,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:54,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795796684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:54,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:54,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:54,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756609206] [2021-05-21 20:44:54,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:54,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:54,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:54,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:54,732 INFO L87 Difference]: Start difference. First operand 110 states and 306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2021-05-21 20:44:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:54,874 INFO L93 Difference]: Finished difference Result 193 states and 494 transitions. [2021-05-21 20:44:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:54,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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 15 [2021-05-21 20:44:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:54,882 INFO L225 Difference]: With dead ends: 193 [2021-05-21 20:44:54,882 INFO L226 Difference]: Without dead ends: 177 [2021-05-21 20:44:54,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:44:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-21 20:44:54,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 119. [2021-05-21 20:44:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.76271186440678) internal successors, (326), 118 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 326 transitions. [2021-05-21 20:44:54,886 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 326 transitions. Word has length 15 [2021-05-21 20:44:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:54,886 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 326 transitions. [2021-05-21 20:44:54,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 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) [2021-05-21 20:44:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 326 transitions. [2021-05-21 20:44:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:54,887 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:54,887 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:55,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 20:44:55,095 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:55,096 INFO L82 PathProgramCache]: Analyzing trace with hash 951223692, now seen corresponding path program 3 times [2021-05-21 20:44:55,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:55,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075231902] [2021-05-21 20:44:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:55,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:55,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075231902] [2021-05-21 20:44:55,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075231902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:55,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208652339] [2021-05-21 20:44:55,145 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 [2021-05-21 20:44:55,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:44:55,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:55,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:55,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:55,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208652339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:55,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:55,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-21 20:44:55,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680052492] [2021-05-21 20:44:55,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:55,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:55,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:55,249 INFO L87 Difference]: Start difference. First operand 119 states and 326 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:55,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:55,700 INFO L93 Difference]: Finished difference Result 240 states and 644 transitions. [2021-05-21 20:44:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:44:55,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:44:55,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:55,701 INFO L225 Difference]: With dead ends: 240 [2021-05-21 20:44:55,701 INFO L226 Difference]: Without dead ends: 188 [2021-05-21 20:44:55,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:44:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-21 20:44:55,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-05-21 20:44:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8584070796460175) internal successors, (323), 113 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-05-21 20:44:55,707 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 15 [2021-05-21 20:44:55,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:55,708 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-05-21 20:44:55,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-05-21 20:44:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:55,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:55,708 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:55,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:55,913 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash 479848854, now seen corresponding path program 1 times [2021-05-21 20:44:55,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:55,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147070851] [2021-05-21 20:44:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:55,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:55,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147070851] [2021-05-21 20:44:55,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147070851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:55,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518985125] [2021-05-21 20:44:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:55,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:44:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:56,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518985125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:56,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:56,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:44:56,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405986083] [2021-05-21 20:44:56,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:56,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:56,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:56,058 INFO L87 Difference]: Start difference. First operand 114 states and 323 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:56,158 INFO L93 Difference]: Finished difference Result 191 states and 526 transitions. [2021-05-21 20:44:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:44:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:56,159 INFO L225 Difference]: With dead ends: 191 [2021-05-21 20:44:56,159 INFO L226 Difference]: Without dead ends: 186 [2021-05-21 20:44:56,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-21 20:44:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2021-05-21 20:44:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.909090909090909) internal successors, (352), 121 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) [2021-05-21 20:44:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 352 transitions. [2021-05-21 20:44:56,163 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 352 transitions. Word has length 15 [2021-05-21 20:44:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:56,163 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 352 transitions. [2021-05-21 20:44:56,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 352 transitions. [2021-05-21 20:44:56,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:56,164 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:56,164 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:56,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 20:44:56,382 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:56,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:56,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1061667084, now seen corresponding path program 2 times [2021-05-21 20:44:56,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:56,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456885025] [2021-05-21 20:44:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:56,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456885025] [2021-05-21 20:44:56,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456885025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266607285] [2021-05-21 20:44:56,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:56,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:56,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:56,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:56,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:56,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266607285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:56,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:56,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-21 20:44:56,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926276752] [2021-05-21 20:44:56,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:44:56,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:44:56,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:44:56,513 INFO L87 Difference]: Start difference. First operand 122 states and 352 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:56,769 INFO L93 Difference]: Finished difference Result 222 states and 617 transitions. [2021-05-21 20:44:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:44:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:44:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:56,770 INFO L225 Difference]: With dead ends: 222 [2021-05-21 20:44:56,770 INFO L226 Difference]: Without dead ends: 203 [2021-05-21 20:44:56,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:44:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-21 20:44:56,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 128. [2021-05-21 20:44:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.937007874015748) internal successors, (373), 127 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 373 transitions. [2021-05-21 20:44:56,774 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 373 transitions. Word has length 15 [2021-05-21 20:44:56,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:56,775 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 373 transitions. [2021-05-21 20:44:56,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 373 transitions. [2021-05-21 20:44:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:56,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:56,775 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:56,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 20:44:56,985 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:56,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:56,985 INFO L82 PathProgramCache]: Analyzing trace with hash 425707830, now seen corresponding path program 2 times [2021-05-21 20:44:56,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:56,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307038290] [2021-05-21 20:44:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:57,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:57,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307038290] [2021-05-21 20:44:57,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307038290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:57,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757465002] [2021-05-21 20:44:57,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:44:57,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:57,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:44:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:57,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757465002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:57,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:57,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 20:44:57,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856243432] [2021-05-21 20:44:57,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:57,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:57,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:57,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:57,134 INFO L87 Difference]: Start difference. First operand 128 states and 373 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:57,529 INFO L93 Difference]: Finished difference Result 285 states and 767 transitions. [2021-05-21 20:44:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:44:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:44:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:57,530 INFO L225 Difference]: With dead ends: 285 [2021-05-21 20:44:57,530 INFO L226 Difference]: Without dead ends: 246 [2021-05-21 20:44:57,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:44:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-21 20:44:57,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 143. [2021-05-21 20:44:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.056338028169014) internal successors, (434), 142 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 434 transitions. [2021-05-21 20:44:57,534 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 434 transitions. Word has length 15 [2021-05-21 20:44:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:57,534 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 434 transitions. [2021-05-21 20:44:57,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 434 transitions. [2021-05-21 20:44:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:57,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:57,535 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:57,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:57,741 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1238287700, now seen corresponding path program 4 times [2021-05-21 20:44:57,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:57,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002320906] [2021-05-21 20:44:57,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:57,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:57,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002320906] [2021-05-21 20:44:57,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002320906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:57,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403311203] [2021-05-21 20:44:57,781 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 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 [2021-05-21 20:44:57,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:44:57,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:44:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:57,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403311203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:57,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:57,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:44:57,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814804975] [2021-05-21 20:44:57,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:57,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:57,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:57,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:57,894 INFO L87 Difference]: Start difference. First operand 143 states and 434 transitions. Second operand has 10 states, 10 states have (on average 2.0) 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) [2021-05-21 20:44:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:57,986 INFO L93 Difference]: Finished difference Result 240 states and 643 transitions. [2021-05-21 20:44:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:44:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) 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 15 [2021-05-21 20:44:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:57,988 INFO L225 Difference]: With dead ends: 240 [2021-05-21 20:44:57,988 INFO L226 Difference]: Without dead ends: 217 [2021-05-21 20:44:57,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:44:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-21 20:44:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 145. [2021-05-21 20:44:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0277777777777777) internal successors, (436), 144 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-05-21 20:44:57,992 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 15 [2021-05-21 20:44:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:57,992 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-05-21 20:44:57,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) 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) [2021-05-21 20:44:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-05-21 20:44:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:57,992 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:57,993 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:58,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 20:44:58,206 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:58,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1919639656, now seen corresponding path program 5 times [2021-05-21 20:44:58,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:58,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677821306] [2021-05-21 20:44:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:58,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:58,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677821306] [2021-05-21 20:44:58,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677821306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:58,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425783497] [2021-05-21 20:44:58,233 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 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 [2021-05-21 20:44:58,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:44:58,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:58,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:58,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:58,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425783497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:58,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:58,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 20:44:58,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772757549] [2021-05-21 20:44:58,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:44:58,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:58,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:44:58,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:44:58,328 INFO L87 Difference]: Start difference. First operand 145 states and 436 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2021-05-21 20:44:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:58,411 INFO L93 Difference]: Finished difference Result 226 states and 636 transitions. [2021-05-21 20:44:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:44:58,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 15 [2021-05-21 20:44:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:58,415 INFO L225 Difference]: With dead ends: 226 [2021-05-21 20:44:58,415 INFO L226 Difference]: Without dead ends: 205 [2021-05-21 20:44:58,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-21 20:44:58,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2021-05-21 20:44:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9548387096774196) internal successors, (458), 155 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-05-21 20:44:58,420 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 15 [2021-05-21 20:44:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:58,421 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-05-21 20:44:58,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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) [2021-05-21 20:44:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-05-21 20:44:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:58,421 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:58,421 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:58,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:58,637 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash 261780050, now seen corresponding path program 3 times [2021-05-21 20:44:58,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:58,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084727162] [2021-05-21 20:44:58,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:58,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:58,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084727162] [2021-05-21 20:44:58,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084727162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:58,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073328197] [2021-05-21 20:44:58,671 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 [2021-05-21 20:44:58,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:44:58,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:58,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:58,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:58,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073328197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:58,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:58,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:44:58,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039763316] [2021-05-21 20:44:58,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:44:58,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:44:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:44:58,754 INFO L87 Difference]: Start difference. First operand 156 states and 458 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:59,127 INFO L93 Difference]: Finished difference Result 360 states and 970 transitions. [2021-05-21 20:44:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:44:59,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:44:59,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:59,130 INFO L225 Difference]: With dead ends: 360 [2021-05-21 20:44:59,130 INFO L226 Difference]: Without dead ends: 313 [2021-05-21 20:44:59,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-05-21 20:44:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-21 20:44:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 169. [2021-05-21 20:44:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.011904761904762) internal successors, (506), 168 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 506 transitions. [2021-05-21 20:44:59,136 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 506 transitions. Word has length 15 [2021-05-21 20:44:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:59,136 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 506 transitions. [2021-05-21 20:44:59,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 506 transitions. [2021-05-21 20:44:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:59,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:59,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:44:59,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:44:59,352 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:44:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:44:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash 970590554, now seen corresponding path program 6 times [2021-05-21 20:44:59,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:44:59,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828483205] [2021-05-21 20:44:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:44:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:44:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:59,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:44:59,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828483205] [2021-05-21 20:44:59,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828483205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:59,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719724243] [2021-05-21 20:44:59,395 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 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 [2021-05-21 20:44:59,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:44:59,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:44:59,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:44:59,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:44:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:44:59,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719724243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:44:59,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:44:59,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-21 20:44:59,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284147004] [2021-05-21 20:44:59,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:44:59,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:44:59,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:44:59,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:44:59,482 INFO L87 Difference]: Start difference. First operand 169 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:44:59,906 INFO L93 Difference]: Finished difference Result 395 states and 1063 transitions. [2021-05-21 20:44:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:44:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:44:59,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:44:59,908 INFO L225 Difference]: With dead ends: 395 [2021-05-21 20:44:59,908 INFO L226 Difference]: Without dead ends: 351 [2021-05-21 20:44:59,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:44:59,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-21 20:44:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 188. [2021-05-21 20:44:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.128342245989305) internal successors, (585), 187 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 585 transitions. [2021-05-21 20:44:59,914 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 585 transitions. Word has length 15 [2021-05-21 20:44:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:44:59,914 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 585 transitions. [2021-05-21 20:44:59,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:44:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 585 transitions. [2021-05-21 20:44:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:44:59,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:44:59,916 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:00,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 20:45:00,132 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1191223272, now seen corresponding path program 3 times [2021-05-21 20:45:00,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:00,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199952979] [2021-05-21 20:45:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:00,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:00,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199952979] [2021-05-21 20:45:00,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199952979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:00,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221679543] [2021-05-21 20:45:00,157 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:45:00,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:45:00,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:00,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:00,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:00,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221679543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:00,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:00,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 20:45:00,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180712130] [2021-05-21 20:45:00,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:00,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:00,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:00,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:00,274 INFO L87 Difference]: Start difference. First operand 188 states and 585 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:00,643 INFO L93 Difference]: Finished difference Result 296 states and 839 transitions. [2021-05-21 20:45:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:45:00,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:00,645 INFO L225 Difference]: With dead ends: 296 [2021-05-21 20:45:00,645 INFO L226 Difference]: Without dead ends: 257 [2021-05-21 20:45:00,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:45:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-21 20:45:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 185. [2021-05-21 20:45:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 3.1032608695652173) internal successors, (571), 184 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 571 transitions. [2021-05-21 20:45:00,650 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 571 transitions. Word has length 15 [2021-05-21 20:45:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:00,650 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 571 transitions. [2021-05-21 20:45:00,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 571 transitions. [2021-05-21 20:45:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:00,651 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:00,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:00,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:00,865 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:00,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1752078530, now seen corresponding path program 4 times [2021-05-21 20:45:00,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:00,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124552352] [2021-05-21 20:45:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:00,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:00,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124552352] [2021-05-21 20:45:00,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124552352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:00,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208602479] [2021-05-21 20:45:00,899 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:00,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:45:00,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:00,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:00,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:00,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208602479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:00,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:00,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 20:45:00,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996573600] [2021-05-21 20:45:00,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:45:00,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:00,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:45:00,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:45:00,967 INFO L87 Difference]: Start difference. First operand 185 states and 571 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:01,044 INFO L93 Difference]: Finished difference Result 224 states and 652 transitions. [2021-05-21 20:45:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:45:01,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:45:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:01,046 INFO L225 Difference]: With dead ends: 224 [2021-05-21 20:45:01,046 INFO L226 Difference]: Without dead ends: 204 [2021-05-21 20:45:01,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:01,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-21 20:45:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 180. [2021-05-21 20:45:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 3.083798882681564) internal successors, (552), 179 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 552 transitions. [2021-05-21 20:45:01,051 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 552 transitions. Word has length 15 [2021-05-21 20:45:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:01,051 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 552 transitions. [2021-05-21 20:45:01,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 552 transitions. [2021-05-21 20:45:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:01,052 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:01,052 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:01,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 20:45:01,265 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:01,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1743627284, now seen corresponding path program 7 times [2021-05-21 20:45:01,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:01,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115483461] [2021-05-21 20:45:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:01,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:01,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115483461] [2021-05-21 20:45:01,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115483461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:01,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843093175] [2021-05-21 20:45:01,312 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 [2021-05-21 20:45:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:01,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:01,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:01,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843093175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:01,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:01,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:45:01,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766902841] [2021-05-21 20:45:01,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:01,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:01,408 INFO L87 Difference]: Start difference. First operand 180 states and 552 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-05-21 20:45:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:01,509 INFO L93 Difference]: Finished difference Result 242 states and 690 transitions. [2021-05-21 20:45:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 15 [2021-05-21 20:45:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:01,510 INFO L225 Difference]: With dead ends: 242 [2021-05-21 20:45:01,510 INFO L226 Difference]: Without dead ends: 231 [2021-05-21 20:45:01,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:45:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-21 20:45:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 178. [2021-05-21 20:45:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 3.0847457627118646) internal successors, (546), 177 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 546 transitions. [2021-05-21 20:45:01,514 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 546 transitions. Word has length 15 [2021-05-21 20:45:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:01,514 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 546 transitions. [2021-05-21 20:45:01,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-05-21 20:45:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 546 transitions. [2021-05-21 20:45:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:01,515 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:01,515 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:01,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:01,732 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1883825052, now seen corresponding path program 8 times [2021-05-21 20:45:01,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:01,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616298126] [2021-05-21 20:45:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:01,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:01,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616298126] [2021-05-21 20:45:01,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616298126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:01,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915742280] [2021-05-21 20:45:01,770 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 [2021-05-21 20:45:01,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:01,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915742280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:01,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:01,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-21 20:45:01,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188916051] [2021-05-21 20:45:01,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:01,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:01,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:01,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:01,867 INFO L87 Difference]: Start difference. First operand 178 states and 546 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:02,361 INFO L93 Difference]: Finished difference Result 322 states and 890 transitions. [2021-05-21 20:45:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:45:02,361 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:02,362 INFO L225 Difference]: With dead ends: 322 [2021-05-21 20:45:02,362 INFO L226 Difference]: Without dead ends: 279 [2021-05-21 20:45:02,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:45:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-21 20:45:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 168. [2021-05-21 20:45:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.0179640718562872) internal successors, (504), 167 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 504 transitions. [2021-05-21 20:45:02,367 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 504 transitions. Word has length 15 [2021-05-21 20:45:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:02,367 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 504 transitions. [2021-05-21 20:45:02,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 504 transitions. [2021-05-21 20:45:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:02,368 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:02,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:02,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-21 20:45:02,573 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2044993746, now seen corresponding path program 9 times [2021-05-21 20:45:02,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:02,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82050281] [2021-05-21 20:45:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:02,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:02,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82050281] [2021-05-21 20:45:02,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82050281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:02,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482028824] [2021-05-21 20:45:02,619 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 [2021-05-21 20:45:02,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:45:02,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:02,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:02,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482028824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:02,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:02,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:45:02,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404453822] [2021-05-21 20:45:02,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:02,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:02,753 INFO L87 Difference]: Start difference. First operand 168 states and 504 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-05-21 20:45:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:02,860 INFO L93 Difference]: Finished difference Result 251 states and 721 transitions. [2021-05-21 20:45:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 15 [2021-05-21 20:45:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:02,861 INFO L225 Difference]: With dead ends: 251 [2021-05-21 20:45:02,861 INFO L226 Difference]: Without dead ends: 240 [2021-05-21 20:45:02,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:45:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-21 20:45:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 167. [2021-05-21 20:45:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 3.0180722891566263) internal successors, (501), 166 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 501 transitions. [2021-05-21 20:45:02,866 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 501 transitions. Word has length 15 [2021-05-21 20:45:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:02,866 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 501 transitions. [2021-05-21 20:45:02,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-05-21 20:45:02,867 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 501 transitions. [2021-05-21 20:45:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:02,867 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:02,867 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:03,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:03,073 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1908842768, now seen corresponding path program 4 times [2021-05-21 20:45:03,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:03,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749340795] [2021-05-21 20:45:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:03,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:03,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749340795] [2021-05-21 20:45:03,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749340795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:03,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963032734] [2021-05-21 20:45:03,095 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 [2021-05-21 20:45:03,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:45:03,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:03,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963032734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:03,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:03,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 20:45:03,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929717387] [2021-05-21 20:45:03,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:45:03,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:45:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:45:03,170 INFO L87 Difference]: Start difference. First operand 167 states and 501 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:03,235 INFO L93 Difference]: Finished difference Result 216 states and 623 transitions. [2021-05-21 20:45:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:45:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:03,236 INFO L225 Difference]: With dead ends: 216 [2021-05-21 20:45:03,236 INFO L226 Difference]: Without dead ends: 194 [2021-05-21 20:45:03,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-21 20:45:03,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2021-05-21 20:45:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.953488372093023) internal successors, (508), 172 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:03,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 508 transitions. [2021-05-21 20:45:03,239 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 508 transitions. Word has length 15 [2021-05-21 20:45:03,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:03,239 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 508 transitions. [2021-05-21 20:45:03,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 508 transitions. [2021-05-21 20:45:03,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:03,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:03,240 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:03,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:03,449 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash -838645562, now seen corresponding path program 10 times [2021-05-21 20:45:03,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:03,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042951416] [2021-05-21 20:45:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:03,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:03,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042951416] [2021-05-21 20:45:03,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042951416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:03,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710116273] [2021-05-21 20:45:03,483 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 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 [2021-05-21 20:45:03,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:45:03,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:03,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:03,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:03,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710116273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:03,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:03,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:45:03,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417329439] [2021-05-21 20:45:03,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:45:03,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:45:03,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:45:03,575 INFO L87 Difference]: Start difference. First operand 173 states and 508 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:03,663 INFO L93 Difference]: Finished difference Result 216 states and 576 transitions. [2021-05-21 20:45:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:03,664 INFO L225 Difference]: With dead ends: 216 [2021-05-21 20:45:03,664 INFO L226 Difference]: Without dead ends: 200 [2021-05-21 20:45:03,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-21 20:45:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 166. [2021-05-21 20:45:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.981818181818182) internal successors, (492), 165 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 492 transitions. [2021-05-21 20:45:03,667 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 492 transitions. Word has length 15 [2021-05-21 20:45:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:03,667 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 492 transitions. [2021-05-21 20:45:03,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:03,668 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 492 transitions. [2021-05-21 20:45:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:03,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:03,668 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:03,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-21 20:45:03,886 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:03,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1450061836, now seen corresponding path program 5 times [2021-05-21 20:45:03,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:03,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588992567] [2021-05-21 20:45:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:03,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:03,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588992567] [2021-05-21 20:45:03,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588992567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:03,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789251932] [2021-05-21 20:45:03,911 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 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 [2021-05-21 20:45:03,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:03,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:03,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:03,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:03,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789251932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:03,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:03,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-21 20:45:03,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667022370] [2021-05-21 20:45:03,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:45:03,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:45:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:03,995 INFO L87 Difference]: Start difference. First operand 166 states and 492 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:04,208 INFO L93 Difference]: Finished difference Result 232 states and 645 transitions. [2021-05-21 20:45:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:45:04,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:45:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:04,210 INFO L225 Difference]: With dead ends: 232 [2021-05-21 20:45:04,210 INFO L226 Difference]: Without dead ends: 198 [2021-05-21 20:45:04,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:45:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-21 20:45:04,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2021-05-21 20:45:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.9430379746835444) internal successors, (465), 158 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:04,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 465 transitions. [2021-05-21 20:45:04,213 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 465 transitions. Word has length 15 [2021-05-21 20:45:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:04,213 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 465 transitions. [2021-05-21 20:45:04,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 465 transitions. [2021-05-21 20:45:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:04,213 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:04,213 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:04,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:04,429 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash -260492346, now seen corresponding path program 11 times [2021-05-21 20:45:04,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:04,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494674573] [2021-05-21 20:45:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:04,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:04,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494674573] [2021-05-21 20:45:04,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494674573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:04,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778363532] [2021-05-21 20:45:04,469 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 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 [2021-05-21 20:45:04,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:04,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:04,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:04,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:04,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778363532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:04,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:04,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:45:04,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648580283] [2021-05-21 20:45:04,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:45:04,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:45:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:04,569 INFO L87 Difference]: Start difference. First operand 159 states and 465 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:04,670 INFO L93 Difference]: Finished difference Result 214 states and 577 transitions. [2021-05-21 20:45:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:04,671 INFO L225 Difference]: With dead ends: 214 [2021-05-21 20:45:04,671 INFO L226 Difference]: Without dead ends: 203 [2021-05-21 20:45:04,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-21 20:45:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 156. [2021-05-21 20:45:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9419354838709677) internal successors, (456), 155 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 456 transitions. [2021-05-21 20:45:04,675 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 456 transitions. Word has length 15 [2021-05-21 20:45:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:04,675 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 456 transitions. [2021-05-21 20:45:04,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 456 transitions. [2021-05-21 20:45:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:04,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:04,675 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:04,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-21 20:45:04,888 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:04,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash 738121340, now seen corresponding path program 6 times [2021-05-21 20:45:04,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:04,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318561172] [2021-05-21 20:45:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:04,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:04,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318561172] [2021-05-21 20:45:04,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318561172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:04,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72796055] [2021-05-21 20:45:04,914 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 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 [2021-05-21 20:45:04,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:45:04,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:04,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:04,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:04,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72796055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:04,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:04,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-21 20:45:04,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299431691] [2021-05-21 20:45:04,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:45:04,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:04,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:45:04,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:45:04,972 INFO L87 Difference]: Start difference. First operand 156 states and 456 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:05,043 INFO L93 Difference]: Finished difference Result 192 states and 534 transitions. [2021-05-21 20:45:05,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:45:05,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:45:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:05,044 INFO L225 Difference]: With dead ends: 192 [2021-05-21 20:45:05,044 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:45:05,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:45:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2021-05-21 20:45:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.927007299270073) internal successors, (401), 137 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 401 transitions. [2021-05-21 20:45:05,046 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 401 transitions. Word has length 15 [2021-05-21 20:45:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:05,046 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 401 transitions. [2021-05-21 20:45:05,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:05,046 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 401 transitions. [2021-05-21 20:45:05,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:05,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:05,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:05,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:05,261 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash -886595830, now seen corresponding path program 5 times [2021-05-21 20:45:05,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:05,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990952420] [2021-05-21 20:45:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:05,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:05,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990952420] [2021-05-21 20:45:05,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990952420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:05,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087851230] [2021-05-21 20:45:05,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:05,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:05,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:05,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:05,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:05,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087851230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:05,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:05,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:45:05,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720575452] [2021-05-21 20:45:05,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:45:05,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:05,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:45:05,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:45:05,380 INFO L87 Difference]: Start difference. First operand 138 states and 401 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:05,489 INFO L93 Difference]: Finished difference Result 165 states and 444 transitions. [2021-05-21 20:45:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:05,489 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:05,490 INFO L225 Difference]: With dead ends: 165 [2021-05-21 20:45:05,490 INFO L226 Difference]: Without dead ends: 150 [2021-05-21 20:45:05,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:45:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-21 20:45:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-05-21 20:45:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.9407407407407407) internal successors, (397), 135 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 397 transitions. [2021-05-21 20:45:05,492 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 397 transitions. Word has length 15 [2021-05-21 20:45:05,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:05,492 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 397 transitions. [2021-05-21 20:45:05,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 397 transitions. [2021-05-21 20:45:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:05,493 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:05,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:05,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:05,708 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash 981607308, now seen corresponding path program 6 times [2021-05-21 20:45:05,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:05,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18188384] [2021-05-21 20:45:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:05,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:05,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18188384] [2021-05-21 20:45:05,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18188384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:05,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334590442] [2021-05-21 20:45:05,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:05,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:45:05,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:05,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:05,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:05,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334590442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:05,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:05,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-21 20:45:05,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891798191] [2021-05-21 20:45:05,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:05,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:05,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:05,841 INFO L87 Difference]: Start difference. First operand 136 states and 397 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:06,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:06,123 INFO L93 Difference]: Finished difference Result 223 states and 580 transitions. [2021-05-21 20:45:06,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:45:06,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:06,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:06,124 INFO L225 Difference]: With dead ends: 223 [2021-05-21 20:45:06,124 INFO L226 Difference]: Without dead ends: 191 [2021-05-21 20:45:06,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:45:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-21 20:45:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 137. [2021-05-21 20:45:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.9558823529411766) internal successors, (402), 136 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 402 transitions. [2021-05-21 20:45:06,127 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 402 transitions. Word has length 15 [2021-05-21 20:45:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:06,127 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 402 transitions. [2021-05-21 20:45:06,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 402 transitions. [2021-05-21 20:45:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:06,127 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:06,127 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:06,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-21 20:45:06,333 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1341646634, now seen corresponding path program 7 times [2021-05-21 20:45:06,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:06,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688362260] [2021-05-21 20:45:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:06,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:06,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688362260] [2021-05-21 20:45:06,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688362260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:06,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194270918] [2021-05-21 20:45:06,370 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 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 [2021-05-21 20:45:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:06,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:06,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:06,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194270918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:06,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:06,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-21 20:45:06,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042336985] [2021-05-21 20:45:06,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:06,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:06,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:06,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:06,484 INFO L87 Difference]: Start difference. First operand 137 states and 402 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-05-21 20:45:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:06,583 INFO L93 Difference]: Finished difference Result 182 states and 485 transitions. [2021-05-21 20:45:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 15 [2021-05-21 20:45:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:06,584 INFO L225 Difference]: With dead ends: 182 [2021-05-21 20:45:06,584 INFO L226 Difference]: Without dead ends: 175 [2021-05-21 20:45:06,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:45:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-21 20:45:06,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2021-05-21 20:45:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.9784172661870505) internal successors, (414), 139 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 414 transitions. [2021-05-21 20:45:06,593 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 414 transitions. Word has length 15 [2021-05-21 20:45:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:06,593 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 414 transitions. [2021-05-21 20:45:06,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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) [2021-05-21 20:45:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 414 transitions. [2021-05-21 20:45:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:06,601 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:06,601 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:06,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-21 20:45:06,807 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:06,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:06,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1273184878, now seen corresponding path program 12 times [2021-05-21 20:45:06,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:06,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355809144] [2021-05-21 20:45:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:06,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:06,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355809144] [2021-05-21 20:45:06,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355809144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:06,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759430546] [2021-05-21 20:45:06,838 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 [2021-05-21 20:45:06,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:45:06,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:06,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:06,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759430546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:06,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:06,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:45:06,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434278957] [2021-05-21 20:45:06,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:45:06,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:06,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:45:06,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:06,917 INFO L87 Difference]: Start difference. First operand 140 states and 414 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:07,029 INFO L93 Difference]: Finished difference Result 222 states and 585 transitions. [2021-05-21 20:45:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:07,030 INFO L225 Difference]: With dead ends: 222 [2021-05-21 20:45:07,030 INFO L226 Difference]: Without dead ends: 211 [2021-05-21 20:45:07,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-21 20:45:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2021-05-21 20:45:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.0141843971631204) internal successors, (425), 141 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 425 transitions. [2021-05-21 20:45:07,033 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 425 transitions. Word has length 15 [2021-05-21 20:45:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:07,033 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 425 transitions. [2021-05-21 20:45:07,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 425 transitions. [2021-05-21 20:45:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:07,033 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:07,033 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:07,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-05-21 20:45:07,249 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:07,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1876876436, now seen corresponding path program 8 times [2021-05-21 20:45:07,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:07,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016473353] [2021-05-21 20:45:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:07,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016473353] [2021-05-21 20:45:07,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016473353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11064535] [2021-05-21 20:45:07,289 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 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 [2021-05-21 20:45:07,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:07,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:07,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:07,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:07,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11064535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:07,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:07,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:45:07,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164980937] [2021-05-21 20:45:07,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:45:07,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:07,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:45:07,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:07,374 INFO L87 Difference]: Start difference. First operand 142 states and 425 transitions. Second operand has 10 states, 10 states have (on average 2.1) 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) [2021-05-21 20:45:07,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:07,460 INFO L93 Difference]: Finished difference Result 172 states and 476 transitions. [2021-05-21 20:45:07,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:07,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) 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 15 [2021-05-21 20:45:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:07,461 INFO L225 Difference]: With dead ends: 172 [2021-05-21 20:45:07,461 INFO L226 Difference]: Without dead ends: 163 [2021-05-21 20:45:07,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:45:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-21 20:45:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 141. [2021-05-21 20:45:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.007142857142857) internal successors, (421), 140 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 421 transitions. [2021-05-21 20:45:07,463 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 421 transitions. Word has length 15 [2021-05-21 20:45:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:07,464 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 421 transitions. [2021-05-21 20:45:07,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) 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) [2021-05-21 20:45:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 421 transitions. [2021-05-21 20:45:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:07,464 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:07,464 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:07,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 20:45:07,681 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1270559102, now seen corresponding path program 13 times [2021-05-21 20:45:07,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:07,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046221293] [2021-05-21 20:45:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:07,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:07,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046221293] [2021-05-21 20:45:07,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046221293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:07,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265727768] [2021-05-21 20:45:07,712 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 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 [2021-05-21 20:45:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:07,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:07,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:07,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265727768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:07,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:07,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:45:07,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630862971] [2021-05-21 20:45:07,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:45:07,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:45:07,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:45:07,780 INFO L87 Difference]: Start difference. First operand 141 states and 421 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:07,889 INFO L93 Difference]: Finished difference Result 205 states and 556 transitions. [2021-05-21 20:45:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:07,890 INFO L225 Difference]: With dead ends: 205 [2021-05-21 20:45:07,890 INFO L226 Difference]: Without dead ends: 194 [2021-05-21 20:45:07,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-21 20:45:07,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 141. [2021-05-21 20:45:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.9785714285714286) internal successors, (417), 140 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 417 transitions. [2021-05-21 20:45:07,892 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 417 transitions. Word has length 15 [2021-05-21 20:45:07,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:07,892 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 417 transitions. [2021-05-21 20:45:07,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 417 transitions. [2021-05-21 20:45:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:07,893 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:07,893 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:08,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 20:45:08,097 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:08,097 INFO L82 PathProgramCache]: Analyzing trace with hash 647834570, now seen corresponding path program 9 times [2021-05-21 20:45:08,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:08,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452917368] [2021-05-21 20:45:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:08,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:08,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452917368] [2021-05-21 20:45:08,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452917368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:08,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217920516] [2021-05-21 20:45:08,125 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 [2021-05-21 20:45:08,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:45:08,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:08,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:08,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:08,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217920516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:08,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:08,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-21 20:45:08,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997061610] [2021-05-21 20:45:08,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:45:08,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:08,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:45:08,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:08,212 INFO L87 Difference]: Start difference. First operand 141 states and 417 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:08,427 INFO L93 Difference]: Finished difference Result 220 states and 577 transitions. [2021-05-21 20:45:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:45:08,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:08,428 INFO L225 Difference]: With dead ends: 220 [2021-05-21 20:45:08,429 INFO L226 Difference]: Without dead ends: 183 [2021-05-21 20:45:08,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:45:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-21 20:45:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-05-21 20:45:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.948148148148148) internal successors, (398), 135 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 398 transitions. [2021-05-21 20:45:08,431 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 398 transitions. Word has length 15 [2021-05-21 20:45:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:08,431 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 398 transitions. [2021-05-21 20:45:08,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:08,431 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 398 transitions. [2021-05-21 20:45:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:08,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:08,432 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:08,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:08,647 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:08,647 INFO L82 PathProgramCache]: Analyzing trace with hash 716296326, now seen corresponding path program 14 times [2021-05-21 20:45:08,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:08,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140518742] [2021-05-21 20:45:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:08,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:08,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140518742] [2021-05-21 20:45:08,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140518742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:08,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931915565] [2021-05-21 20:45:08,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:45:08,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:08,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:08,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:08,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931915565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:08,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:08,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:45:08,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382387893] [2021-05-21 20:45:08,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:45:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:45:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:08,760 INFO L87 Difference]: Start difference. First operand 136 states and 398 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:08,846 INFO L93 Difference]: Finished difference Result 180 states and 499 transitions. [2021-05-21 20:45:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:08,846 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:08,847 INFO L225 Difference]: With dead ends: 180 [2021-05-21 20:45:08,847 INFO L226 Difference]: Without dead ends: 169 [2021-05-21 20:45:08,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:08,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-21 20:45:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2021-05-21 20:45:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.9477611940298507) internal successors, (395), 134 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 395 transitions. [2021-05-21 20:45:08,849 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 395 transitions. Word has length 15 [2021-05-21 20:45:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:08,849 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 395 transitions. [2021-05-21 20:45:08,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 395 transitions. [2021-05-21 20:45:08,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:08,850 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:08,850 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:09,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 20:45:09,057 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:09,057 INFO L82 PathProgramCache]: Analyzing trace with hash 209950060, now seen corresponding path program 15 times [2021-05-21 20:45:09,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:09,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877168747] [2021-05-21 20:45:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:09,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:09,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877168747] [2021-05-21 20:45:09,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877168747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:09,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146642521] [2021-05-21 20:45:09,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:09,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:45:09,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:09,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:09,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146642521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:09,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:09,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:45:09,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110267068] [2021-05-21 20:45:09,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:45:09,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:09,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:45:09,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:09,168 INFO L87 Difference]: Start difference. First operand 135 states and 395 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:09,268 INFO L93 Difference]: Finished difference Result 197 states and 527 transitions. [2021-05-21 20:45:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:09,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:09,269 INFO L225 Difference]: With dead ends: 197 [2021-05-21 20:45:09,269 INFO L226 Difference]: Without dead ends: 186 [2021-05-21 20:45:09,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:09,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-21 20:45:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 134. [2021-05-21 20:45:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.9473684210526314) internal successors, (392), 133 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2021-05-21 20:45:09,282 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 15 [2021-05-21 20:45:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:09,282 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2021-05-21 20:45:09,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2021-05-21 20:45:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:09,282 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:09,282 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:09,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:09,485 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:09,485 INFO L82 PathProgramCache]: Analyzing trace with hash 524208692, now seen corresponding path program 10 times [2021-05-21 20:45:09,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:09,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084926253] [2021-05-21 20:45:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:09,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:09,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084926253] [2021-05-21 20:45:09,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084926253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:09,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400598936] [2021-05-21 20:45:09,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:09,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:45:09,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:09,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:09,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400598936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:09,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:09,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:45:09,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139586116] [2021-05-21 20:45:09,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:45:09,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:09,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:45:09,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:45:09,613 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:09,707 INFO L93 Difference]: Finished difference Result 180 states and 469 transitions. [2021-05-21 20:45:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:09,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:09,708 INFO L225 Difference]: With dead ends: 180 [2021-05-21 20:45:09,708 INFO L226 Difference]: Without dead ends: 172 [2021-05-21 20:45:09,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-21 20:45:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 133. [2021-05-21 20:45:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.946969696969697) internal successors, (389), 132 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:09,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 389 transitions. [2021-05-21 20:45:09,722 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 389 transitions. Word has length 15 [2021-05-21 20:45:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:09,722 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 389 transitions. [2021-05-21 20:45:09,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 389 transitions. [2021-05-21 20:45:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:09,723 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:09,723 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:09,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-21 20:45:09,923 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:09,924 INFO L82 PathProgramCache]: Analyzing trace with hash 22578118, now seen corresponding path program 11 times [2021-05-21 20:45:09,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:09,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066945471] [2021-05-21 20:45:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:09,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:09,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066945471] [2021-05-21 20:45:09,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066945471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:09,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100631890] [2021-05-21 20:45:09,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:09,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:09,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:09,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:10,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100631890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:10,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:10,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 20:45:10,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720051662] [2021-05-21 20:45:10,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:45:10,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:10,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:45:10,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:45:10,016 INFO L87 Difference]: Start difference. First operand 133 states and 389 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2021-05-21 20:45:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:10,091 INFO L93 Difference]: Finished difference Result 154 states and 429 transitions. [2021-05-21 20:45:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:45:10,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 15 [2021-05-21 20:45:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:10,091 INFO L225 Difference]: With dead ends: 154 [2021-05-21 20:45:10,091 INFO L226 Difference]: Without dead ends: 130 [2021-05-21 20:45:10,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-21 20:45:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-05-21 20:45:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.9224806201550386) internal successors, (377), 129 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 377 transitions. [2021-05-21 20:45:10,094 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 377 transitions. Word has length 15 [2021-05-21 20:45:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:10,094 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 377 transitions. [2021-05-21 20:45:10,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2021-05-21 20:45:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 377 transitions. [2021-05-21 20:45:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:45:10,094 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:10,094 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:10,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-21 20:45:10,309 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash 212575836, now seen corresponding path program 16 times [2021-05-21 20:45:10,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:10,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056234302] [2021-05-21 20:45:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:10,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:10,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056234302] [2021-05-21 20:45:10,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056234302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:10,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833844324] [2021-05-21 20:45:10,335 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 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 [2021-05-21 20:45:10,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:45:10,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:10,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:45:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:10,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833844324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:10,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:10,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-21 20:45:10,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144686038] [2021-05-21 20:45:10,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:45:10,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:10,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:45:10,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:45:10,406 INFO L87 Difference]: Start difference. First operand 130 states and 377 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:10,497 INFO L93 Difference]: Finished difference Result 180 states and 499 transitions. [2021-05-21 20:45:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:45:10,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:10,498 INFO L225 Difference]: With dead ends: 180 [2021-05-21 20:45:10,498 INFO L226 Difference]: Without dead ends: 169 [2021-05-21 20:45:10,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:45:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-21 20:45:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 119. [2021-05-21 20:45:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.9237288135593222) internal successors, (345), 118 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 345 transitions. [2021-05-21 20:45:10,500 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 345 transitions. Word has length 15 [2021-05-21 20:45:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:10,500 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 345 transitions. [2021-05-21 20:45:10,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 345 transitions. [2021-05-21 20:45:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:45:10,501 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:10,501 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:10,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:10,701 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:10,702 INFO L82 PathProgramCache]: Analyzing trace with hash 907579970, now seen corresponding path program 1 times [2021-05-21 20:45:10,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:10,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95442316] [2021-05-21 20:45:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:45:10,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:10,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95442316] [2021-05-21 20:45:10,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95442316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:10,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216698455] [2021-05-21 20:45:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:45:10,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216698455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:10,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:10,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-21 20:45:10,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228629763] [2021-05-21 20:45:10,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:45:10,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:10,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:45:10,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:45:10,807 INFO L87 Difference]: Start difference. First operand 119 states and 345 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) 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) [2021-05-21 20:45:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:10,886 INFO L93 Difference]: Finished difference Result 161 states and 443 transitions. [2021-05-21 20:45:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:45:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) 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 [2021-05-21 20:45:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:10,887 INFO L225 Difference]: With dead ends: 161 [2021-05-21 20:45:10,887 INFO L226 Difference]: Without dead ends: 148 [2021-05-21 20:45:10,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:45:10,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-21 20:45:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-05-21 20:45:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.926829268292683) internal successors, (360), 123 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 360 transitions. [2021-05-21 20:45:10,889 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 360 transitions. Word has length 16 [2021-05-21 20:45:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:10,889 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 360 transitions. [2021-05-21 20:45:10,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) 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) [2021-05-21 20:45:10,889 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 360 transitions. [2021-05-21 20:45:10,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 20:45:10,889 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:10,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:11,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 20:45:11,105 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:11,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1153279832, now seen corresponding path program 2 times [2021-05-21 20:45:11,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:11,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651356595] [2021-05-21 20:45:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:45:11,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:11,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651356595] [2021-05-21 20:45:11,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651356595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:11,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202623327] [2021-05-21 20:45:11,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:11,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:45:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:45:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:45:11,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:45:11,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202623327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:11,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:45:11,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-21 20:45:11,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071921655] [2021-05-21 20:45:11,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:45:11,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:45:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:45:11,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:45:11,218 INFO L87 Difference]: Start difference. First operand 124 states and 360 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:45:11,270 INFO L93 Difference]: Finished difference Result 156 states and 442 transitions. [2021-05-21 20:45:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:45:11,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-05-21 20:45:11,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:45:11,271 INFO L225 Difference]: With dead ends: 156 [2021-05-21 20:45:11,271 INFO L226 Difference]: Without dead ends: 143 [2021-05-21 20:45:11,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:45:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-21 20:45:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2021-05-21 20:45:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-05-21 20:45:11,273 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-05-21 20:45:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:45:11,273 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-05-21 20:45:11,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:45:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-05-21 20:45:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:45:11,274 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:45:11,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:45:11,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:11,474 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:45:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:45:11,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1638627788, now seen corresponding path program 1 times [2021-05-21 20:45:11,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:45:11,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020922847] [2021-05-21 20:45:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:45:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:45:11,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:45:11,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020922847] [2021-05-21 20:45:11,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020922847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:45:11,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499355450] [2021-05-21 20:45:11,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 20:45:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:45:11,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 20:45:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:45:11,800 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-21 20:45:12,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:45:12,013 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-21 20:45:12,016 INFO L168 Benchmark]: Toolchain (without parser) took 19826.41 ms. Allocated memory was 358.6 MB in the beginning and 442.5 MB in the end (delta: 83.9 MB). Free memory was 337.7 MB in the beginning and 366.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 57.2 MB. Max. memory is 16.0 GB. [2021-05-21 20:45:12,016 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 358.6 MB. Free memory is still 339.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:45:12,016 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.88 ms. Allocated memory is still 358.6 MB. Free memory was 337.6 MB in the beginning and 336.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:45:12,016 INFO L168 Benchmark]: Boogie Preprocessor took 23.58 ms. Allocated memory is still 358.6 MB. Free memory was 336.1 MB in the beginning and 335.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:45:12,017 INFO L168 Benchmark]: RCFGBuilder took 309.66 ms. Allocated memory is still 358.6 MB. Free memory was 335.0 MB in the beginning and 338.9 MB in the end (delta: -3.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-05-21 20:45:12,017 INFO L168 Benchmark]: TraceAbstraction took 19469.53 ms. Allocated memory was 358.6 MB in the beginning and 442.5 MB in the end (delta: 83.9 MB). Free memory was 338.9 MB in the beginning and 366.6 MB in the end (delta: -27.8 MB). Peak memory consumption was 57.2 MB. Max. memory is 16.0 GB. [2021-05-21 20:45:12,017 INFO L339 ainManager$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 358.6 MB. Free memory is still 339.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.88 ms. Allocated memory is still 358.6 MB. Free memory was 337.6 MB in the beginning and 336.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.58 ms. Allocated memory is still 358.6 MB. Free memory was 336.1 MB in the beginning and 335.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 309.66 ms. Allocated memory is still 358.6 MB. Free memory was 335.0 MB in the beginning and 338.9 MB in the end (delta: -3.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 19469.53 ms. Allocated memory was 358.6 MB in the beginning and 442.5 MB in the end (delta: 83.9 MB). Free memory was 338.9 MB in the beginning and 366.6 MB in the end (delta: -27.8 MB). Peak memory consumption was 57.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...