/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 10:56:23,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 10:56:23,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 10:56:23,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 10:56:23,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 10:56:23,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 10:56:23,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 10:56:23,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 10:56:23,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 10:56:23,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 10:56:23,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 10:56:23,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-07-07 10:56:23,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 10:56:23,614 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 10:56:23,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 10:56:23,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 10:56:23,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 10:56:23,619 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 10:56:23,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 10:56:23,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 10:56:23,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 10:56:23,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 10:56:23,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 10:56:23,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 10:56:23,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 10:56:23,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 10:56:23,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 10:56:23,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 10:56:23,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 10:56:23,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 10:56:23,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 10:56:23,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 10:56:23,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 10:56:23,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 10:56:23,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:56:23,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 10:56:23,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 10:56:23,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 10:56:23,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 10:56:23,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 10:56:23,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 10:56:23,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 10:56:23,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 10:56:23,905 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 10:56:23,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 10:56:23,920 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 10:56:23,921 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 10:56:23,922 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 10:56:23,923 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-07 10:56:23,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798e62fc4/f55b78d06eb14d42ae5ef47513cb9743/FLAG6043d8738 [2020-07-07 10:56:24,428 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 10:56:24,428 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-07 10:56:24,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798e62fc4/f55b78d06eb14d42ae5ef47513cb9743/FLAG6043d8738 [2020-07-07 10:56:24,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/798e62fc4/f55b78d06eb14d42ae5ef47513cb9743 [2020-07-07 10:56:24,842 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 10:56:24,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 10:56:24,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:24,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 10:56:24,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 10:56:24,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7481651b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:24, skipping insertion in model container [2020-07-07 10:56:24,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:24" (1/1) ... [2020-07-07 10:56:24,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 10:56:24,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 10:56:25,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:25,071 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 10:56:25,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:25,108 INFO L208 MainTranslator]: Completed translation [2020-07-07 10:56:25,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25 WrapperNode [2020-07-07 10:56:25,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:25,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 10:56:25,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 10:56:25,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 10:56:25,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25" (1/1) ... [2020-07-07 10:56:25,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25" (1/1) ... [2020-07-07 10:56:25,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25" (1/1) ... [2020-07-07 10:56:25,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25" (1/1) ... [2020-07-07 10:56:25,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25" (1/1) ... [2020-07-07 10:56:25,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25" (1/1) ... [2020-07-07 10:56:25,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25" (1/1) ... [2020-07-07 10:56:25,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 10:56:25,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 10:56:25,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 10:56:25,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 10:56:25,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25" (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 [2020-07-07 10:56:25,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 10:56:25,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 10:56:25,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-07 10:56:25,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 10:56:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 10:56:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 10:56:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-07 10:56:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 10:56:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 10:56:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 10:56:25,573 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 10:56:25,573 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 10:56:25,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:25 BoogieIcfgContainer [2020-07-07 10:56:25,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 10:56:25,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 10:56:25,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 10:56:25,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 10:56:25,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 10:56:24" (1/3) ... [2020-07-07 10:56:25,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de794c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:25, skipping insertion in model container [2020-07-07 10:56:25,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:25" (2/3) ... [2020-07-07 10:56:25,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de794c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:25, skipping insertion in model container [2020-07-07 10:56:25,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:25" (3/3) ... [2020-07-07 10:56:25,585 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-07-07 10:56:25,594 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 10:56:25,601 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 10:56:25,614 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 10:56:25,633 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 10:56:25,634 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 10:56:25,634 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 10:56:25,634 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 10:56:25,634 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 10:56:25,634 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 10:56:25,634 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 10:56:25,635 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 10:56:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-07 10:56:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 10:56:25,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:25,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:25,659 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-07 10:56:25,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:25,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069074606] [2020-07-07 10:56:25,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 10:56:25,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069074606] [2020-07-07 10:56:25,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 10:56:25,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 10:56:25,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201132169] [2020-07-07 10:56:25,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 10:56:25,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:25,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 10:56:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 10:56:25,909 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-07 10:56:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:26,038 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-07-07 10:56:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:56:26,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-07 10:56:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:26,051 INFO L225 Difference]: With dead ends: 55 [2020-07-07 10:56:26,052 INFO L226 Difference]: Without dead ends: 28 [2020-07-07 10:56:26,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-07 10:56:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-07 10:56:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-07 10:56:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-07 10:56:26,101 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-07-07 10:56:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:26,102 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-07 10:56:26,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 10:56:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-07 10:56:26,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 10:56:26,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:26,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:26,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 10:56:26,106 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:26,107 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-07 10:56:26,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:26,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967208461] [2020-07-07 10:56:26,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:56:26,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967208461] [2020-07-07 10:56:26,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454288621] [2020-07-07 10:56:26,252 INFO L94 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 [2020-07-07 10:56:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,298 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 10:56:26,305 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 10:56:26,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:26,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-07 10:56:26,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231917896] [2020-07-07 10:56:26,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 10:56:26,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:26,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 10:56:26,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:26,374 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 7 states. [2020-07-07 10:56:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:26,485 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2020-07-07 10:56:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:56:26,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-07 10:56:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:26,489 INFO L225 Difference]: With dead ends: 52 [2020-07-07 10:56:26,489 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 10:56:26,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 10:56:26,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 10:56:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 10:56:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-07-07 10:56:26,502 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2020-07-07 10:56:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:26,503 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-07-07 10:56:26,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 10:56:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-07-07 10:56:26,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-07 10:56:26,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:26,506 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:26,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 10:56:26,722 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:26,723 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-07 10:56:26,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:26,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665235142] [2020-07-07 10:56:26,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 10:56:26,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665235142] [2020-07-07 10:56:26,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871892801] [2020-07-07 10:56:26,883 INFO L94 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 [2020-07-07 10:56:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 10:56:26,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 10:56:26,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:26,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-07 10:56:26,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076314675] [2020-07-07 10:56:26,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 10:56:26,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:26,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 10:56:26,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:26,986 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 8 states. [2020-07-07 10:56:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:27,162 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2020-07-07 10:56:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 10:56:27,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-07-07 10:56:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:27,166 INFO L225 Difference]: With dead ends: 77 [2020-07-07 10:56:27,166 INFO L226 Difference]: Without dead ends: 53 [2020-07-07 10:56:27,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:56:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-07 10:56:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-07 10:56:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-07 10:56:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2020-07-07 10:56:27,185 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 35 [2020-07-07 10:56:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:27,185 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2020-07-07 10:56:27,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 10:56:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2020-07-07 10:56:27,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-07 10:56:27,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:27,189 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:27,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:27,403 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:27,404 INFO L82 PathProgramCache]: Analyzing trace with hash -506207890, now seen corresponding path program 2 times [2020-07-07 10:56:27,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:27,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502819302] [2020-07-07 10:56:27,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-07 10:56:27,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502819302] [2020-07-07 10:56:27,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844989331] [2020-07-07 10:56:27,615 INFO L92 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 [2020-07-07 10:56:27,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:27,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:27,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 10:56:27,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-07 10:56:27,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:27,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-07 10:56:27,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113601053] [2020-07-07 10:56:27,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 10:56:27,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 10:56:27,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:56:27,706 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand 9 states. [2020-07-07 10:56:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:27,847 INFO L93 Difference]: Finished difference Result 123 states and 230 transitions. [2020-07-07 10:56:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 10:56:27,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-07-07 10:56:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:27,850 INFO L225 Difference]: With dead ends: 123 [2020-07-07 10:56:27,850 INFO L226 Difference]: Without dead ends: 56 [2020-07-07 10:56:27,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:56:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-07 10:56:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-07 10:56:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-07 10:56:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-07-07 10:56:27,865 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 48 [2020-07-07 10:56:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:27,866 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-07-07 10:56:27,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 10:56:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-07-07 10:56:27,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-07 10:56:27,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:27,871 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:28,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:28,087 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:28,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:28,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2091057537, now seen corresponding path program 3 times [2020-07-07 10:56:28,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:28,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238577003] [2020-07-07 10:56:28,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 150 proven. 216 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2020-07-07 10:56:28,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238577003] [2020-07-07 10:56:28,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103308199] [2020-07-07 10:56:28,526 INFO L92 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 [2020-07-07 10:56:28,616 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-07-07 10:56:28,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:28,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 10:56:28,625 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 182 proven. 101 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-07 10:56:28,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:28,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2020-07-07 10:56:28,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454213251] [2020-07-07 10:56:28,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 10:56:28,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 10:56:28,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2020-07-07 10:56:28,832 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 20 states. [2020-07-07 10:56:30,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:30,007 INFO L93 Difference]: Finished difference Result 129 states and 256 transitions. [2020-07-07 10:56:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 10:56:30,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 122 [2020-07-07 10:56:30,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:30,016 INFO L225 Difference]: With dead ends: 129 [2020-07-07 10:56:30,016 INFO L226 Difference]: Without dead ends: 81 [2020-07-07 10:56:30,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=390, Invalid=1680, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 10:56:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-07 10:56:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-07-07 10:56:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-07 10:56:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 120 transitions. [2020-07-07 10:56:30,046 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 120 transitions. Word has length 122 [2020-07-07 10:56:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:30,047 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 120 transitions. [2020-07-07 10:56:30,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 10:56:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 120 transitions. [2020-07-07 10:56:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-07 10:56:30,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:30,053 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:30,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:30,272 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:30,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2010206023, now seen corresponding path program 4 times [2020-07-07 10:56:30,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:30,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880467489] [2020-07-07 10:56:30,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 163 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-07-07 10:56:30,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880467489] [2020-07-07 10:56:30,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390042613] [2020-07-07 10:56:30,613 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:30,675 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 10:56:30,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:30,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 10:56:30,683 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 286 proven. 71 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-07-07 10:56:30,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:30,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 18 [2020-07-07 10:56:30,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558033397] [2020-07-07 10:56:30,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 10:56:30,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:30,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 10:56:30,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:56:30,755 INFO L87 Difference]: Start difference. First operand 80 states and 120 transitions. Second operand 18 states. [2020-07-07 10:56:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:31,472 INFO L93 Difference]: Finished difference Result 174 states and 312 transitions. [2020-07-07 10:56:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 10:56:31,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 108 [2020-07-07 10:56:31,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:31,476 INFO L225 Difference]: With dead ends: 174 [2020-07-07 10:56:31,476 INFO L226 Difference]: Without dead ends: 97 [2020-07-07 10:56:31,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=1366, Unknown=0, NotChecked=0, Total=1722 [2020-07-07 10:56:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-07 10:56:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2020-07-07 10:56:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-07 10:56:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 130 transitions. [2020-07-07 10:56:31,494 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 130 transitions. Word has length 108 [2020-07-07 10:56:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:31,495 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 130 transitions. [2020-07-07 10:56:31,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 10:56:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 130 transitions. [2020-07-07 10:56:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-07 10:56:31,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:31,497 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:31,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 10:56:31,711 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 5 times [2020-07-07 10:56:31,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:31,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505811924] [2020-07-07 10:56:31,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 153 proven. 289 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-07-07 10:56:32,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505811924] [2020-07-07 10:56:32,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350347895] [2020-07-07 10:56:32,165 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:32,239 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-07-07 10:56:32,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:32,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-07 10:56:32,247 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-07 10:56:32,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:32,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2020-07-07 10:56:32,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920019101] [2020-07-07 10:56:32,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 10:56:32,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:32,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 10:56:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:56:32,321 INFO L87 Difference]: Start difference. First operand 88 states and 130 transitions. Second operand 18 states. [2020-07-07 10:56:33,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:33,008 INFO L93 Difference]: Finished difference Result 197 states and 344 transitions. [2020-07-07 10:56:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-07 10:56:33,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 134 [2020-07-07 10:56:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:33,012 INFO L225 Difference]: With dead ends: 197 [2020-07-07 10:56:33,012 INFO L226 Difference]: Without dead ends: 112 [2020-07-07 10:56:33,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 10:56:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-07 10:56:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-07-07 10:56:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-07 10:56:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 155 transitions. [2020-07-07 10:56:33,031 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 155 transitions. Word has length 134 [2020-07-07 10:56:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:33,032 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 155 transitions. [2020-07-07 10:56:33,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 10:56:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 155 transitions. [2020-07-07 10:56:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-07 10:56:33,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:33,037 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:33,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:33,238 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 6 times [2020-07-07 10:56:33,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:33,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347199373] [2020-07-07 10:56:33,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-07 10:56:33,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347199373] [2020-07-07 10:56:33,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284388172] [2020-07-07 10:56:33,808 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:33,892 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-07-07 10:56:33,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:33,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-07 10:56:33,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-07 10:56:33,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:33,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2020-07-07 10:56:33,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065758114] [2020-07-07 10:56:33,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 10:56:33,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:33,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 10:56:33,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-07-07 10:56:33,982 INFO L87 Difference]: Start difference. First operand 103 states and 155 transitions. Second operand 24 states. [2020-07-07 10:56:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:35,048 INFO L93 Difference]: Finished difference Result 227 states and 402 transitions. [2020-07-07 10:56:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 10:56:35,048 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 160 [2020-07-07 10:56:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:35,053 INFO L225 Difference]: With dead ends: 227 [2020-07-07 10:56:35,053 INFO L226 Difference]: Without dead ends: 136 [2020-07-07 10:56:35,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2020-07-07 10:56:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-07 10:56:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2020-07-07 10:56:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-07 10:56:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 188 transitions. [2020-07-07 10:56:35,097 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 188 transitions. Word has length 160 [2020-07-07 10:56:35,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:35,098 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 188 transitions. [2020-07-07 10:56:35,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 10:56:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 188 transitions. [2020-07-07 10:56:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-07 10:56:35,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:35,104 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:35,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:35,319 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-07 10:56:35,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:35,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754786453] [2020-07-07 10:56:35,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-07-07 10:56:36,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754786453] [2020-07-07 10:56:36,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743328748] [2020-07-07 10:56:36,036 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-07 10:56:36,131 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-07 10:56:36,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:36,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2020-07-07 10:56:36,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315374808] [2020-07-07 10:56:36,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 10:56:36,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:36,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 10:56:36,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-07-07 10:56:36,206 INFO L87 Difference]: Start difference. First operand 118 states and 188 transitions. Second operand 26 states. [2020-07-07 10:56:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:37,329 INFO L93 Difference]: Finished difference Result 183 states and 319 transitions. [2020-07-07 10:56:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-07 10:56:37,335 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 186 [2020-07-07 10:56:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:37,338 INFO L225 Difference]: With dead ends: 183 [2020-07-07 10:56:37,338 INFO L226 Difference]: Without dead ends: 179 [2020-07-07 10:56:37,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=588, Invalid=2604, Unknown=0, NotChecked=0, Total=3192 [2020-07-07 10:56:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-07-07 10:56:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-07-07 10:56:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-07 10:56:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 245 transitions. [2020-07-07 10:56:37,363 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 245 transitions. Word has length 186 [2020-07-07 10:56:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:37,364 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 245 transitions. [2020-07-07 10:56:37,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 10:56:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 245 transitions. [2020-07-07 10:56:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-07 10:56:37,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:37,367 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:37,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 10:56:37,582 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:37,583 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 8 times [2020-07-07 10:56:37,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:37,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261106631] [2020-07-07 10:56:37,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-07-07 10:56:38,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261106631] [2020-07-07 10:56:38,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821743816] [2020-07-07 10:56:38,169 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:38,251 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:38,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:38,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-07 10:56:38,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-07 10:56:38,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:38,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-07-07 10:56:38,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671244669] [2020-07-07 10:56:38,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 10:56:38,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:38,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 10:56:38,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-07 10:56:38,342 INFO L87 Difference]: Start difference. First operand 141 states and 245 transitions. Second operand 25 states. [2020-07-07 10:56:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:39,555 INFO L93 Difference]: Finished difference Result 285 states and 576 transitions. [2020-07-07 10:56:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-07 10:56:39,556 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 173 [2020-07-07 10:56:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:39,557 INFO L225 Difference]: With dead ends: 285 [2020-07-07 10:56:39,557 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 10:56:39,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2020-07-07 10:56:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 10:56:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 10:56:39,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 10:56:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 10:56:39,569 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2020-07-07 10:56:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:39,570 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 10:56:39,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 10:56:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 10:56:39,571 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 10:56:39,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:39,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 10:56:42,141 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 42 [2020-07-07 10:56:42,247 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 10:56:42,248 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:56:42,248 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 10:56:42,248 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 10:56:42,248 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 10:56:42,248 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 10:56:42,249 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-07 10:56:42,249 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-07 10:56:42,249 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (or (not (<= |ackermann_#in~n| 1)) (not (= 0 |ackermann_#in~m|))) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-07-07 10:56:42,249 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-07 10:56:42,249 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (= 0 |ackermann_#in~n|)) [2020-07-07 10:56:42,250 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse3 (= 0 |ackermann_#in~m|)) (.cse5 (= ackermann_~m |ackermann_#in~m|)) (.cse6 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse0 (<= 5 |ackermann_#t~ret1|)) (.cse2 (<= 6 |ackermann_#t~ret1|)) (.cse1 (and .cse3 .cse5 .cse6))) (and (or (and (<= |ackermann_#in~n| 4) .cse0) .cse1 (<= |ackermann_#in~n| 3) .cse2) (or (not (<= |ackermann_#in~n| 0)) .cse3) (let ((.cse7 (<= |ackermann_#in~n| 2)) (.cse9 (<= 1 ackermann_~m)) (.cse10 (<= ackermann_~m 1)) (.cse8 (<= |ackermann_#in~n| 1)) (.cse11 (<= 3 |ackermann_#t~ret1|)) (.cse4 (<= 2 |ackermann_#in~m|))) (or (and (<= ackermann_~m 2) .cse4 .cse5 .cse6 .cse0 .cse7) (and .cse4 .cse5 .cse6 .cse2) (and .cse8 .cse5 .cse6 .cse9 (<= 2 |ackermann_#t~ret1|) .cse10) (and .cse5 .cse11 .cse6 .cse9 .cse10 .cse7) .cse1 (and .cse5 .cse6 .cse9 .cse10 (<= 4 |ackermann_#t~ret1|)) (and .cse8 .cse11 .cse4 .cse5 .cse6)))))) [2020-07-07 10:56:42,250 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-07 10:56:42,250 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-07 10:56:42,250 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-07 10:56:42,250 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-07 10:56:42,250 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-07 10:56:42,251 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-07 10:56:42,251 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-07 10:56:42,251 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-07 10:56:42,251 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-07 10:56:42,251 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-07 10:56:42,251 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-07 10:56:42,252 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-07 10:56:42,252 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-07 10:56:42,252 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-07 10:56:42,252 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-07 10:56:42,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 10:56:42 BoogieIcfgContainer [2020-07-07 10:56:42,256 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 10:56:42,258 INFO L168 Benchmark]: Toolchain (without parser) took 17414.35 ms. Allocated memory was 136.8 MB in the beginning and 438.3 MB in the end (delta: 301.5 MB). Free memory was 100.3 MB in the beginning and 99.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 302.6 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,259 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,259 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.70 ms. Allocated memory is still 136.8 MB. Free memory was 100.1 MB in the beginning and 90.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,260 INFO L168 Benchmark]: Boogie Preprocessor took 29.55 ms. Allocated memory is still 136.8 MB. Free memory was 90.6 MB in the beginning and 89.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,261 INFO L168 Benchmark]: RCFGBuilder took 437.06 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 89.2 MB in the beginning and 166.9 MB in the end (delta: -77.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,261 INFO L168 Benchmark]: TraceAbstraction took 16678.33 ms. Allocated memory was 200.8 MB in the beginning and 438.3 MB in the end (delta: 237.5 MB). Free memory was 166.9 MB in the beginning and 99.2 MB in the end (delta: 67.7 MB). Peak memory consumption was 305.2 MB. Max. memory is 7.1 GB. [2020-07-07 10:56:42,264 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.70 ms. Allocated memory is still 136.8 MB. Free memory was 100.1 MB in the beginning and 90.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.55 ms. Allocated memory is still 136.8 MB. Free memory was 90.6 MB in the beginning and 89.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 437.06 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 89.2 MB in the beginning and 166.9 MB in the end (delta: -77.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16678.33 ms. Allocated memory was 200.8 MB in the beginning and 438.3 MB in the end (delta: 237.5 MB). Free memory was 166.9 MB in the beginning and 99.2 MB in the end (delta: 67.7 MB). Peak memory consumption was 305.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.1s, OverallIterations: 10, TraceHistogramMax: 27, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 272 SDtfs, 270 SDslu, 1464 SDs, 0 SdLazy, 3578 SolverSat, 743 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1621 GetRequests, 1297 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3184 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 75 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 541 PreInvPairs, 1180 NumberOfFragments, 178 HoareAnnotationTreeSize, 541 FomulaSimplifications, 91888 FormulaSimplificationTreeSizeReduction, 1.3s HoareSimplificationTime, 9 FomulaSimplificationsInter, 3640 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1991 NumberOfCodeBlocks, 1907 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 1972 ConstructedInterpolants, 0 QuantifiedInterpolants, 499834 SizeOfPredicates, 64 NumberOfNonLiveVariables, 2659 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 10713/13156 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...