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/eca-rers2012/Problem14_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:09,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:09,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:09,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 22:02:09,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:09,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:09,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:09,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:09,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:09,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:09,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:09,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:09,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:09,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:09,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:09,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:09,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:09,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:09,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:09,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:09,173 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 [2019-10-14 22:02:09,195 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:09,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:09,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:09,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:09,200 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:09,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:09,201 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:09,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:09,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:09,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:09,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:09,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:09,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:09,202 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:09,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:09,203 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:09,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:09,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:09,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:09,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:09,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:09,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:09,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:09,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:09,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:09,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:09,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:09,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:09,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:09,491 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:09,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:09,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:09,510 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:09,511 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:09,511 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label43.c [2019-10-14 22:02:09,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/999a1adc7/a607b975ef7e4a749d245c60074fb080/FLAGd1bb10d66 [2019-10-14 22:02:10,216 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:10,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label43.c [2019-10-14 22:02:10,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/999a1adc7/a607b975ef7e4a749d245c60074fb080/FLAGd1bb10d66 [2019-10-14 22:02:10,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/999a1adc7/a607b975ef7e4a749d245c60074fb080 [2019-10-14 22:02:10,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:10,482 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:10,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:10,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:10,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:10,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:10" (1/1) ... [2019-10-14 22:02:10,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c28f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:10, skipping insertion in model container [2019-10-14 22:02:10,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:10" (1/1) ... [2019-10-14 22:02:10,501 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:10,562 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:11,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:11,149 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:11,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:11,370 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:11,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11 WrapperNode [2019-10-14 22:02:11,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:11,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:11,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:11,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:11,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11" (1/1) ... [2019-10-14 22:02:11,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11" (1/1) ... [2019-10-14 22:02:11,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11" (1/1) ... [2019-10-14 22:02:11,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11" (1/1) ... [2019-10-14 22:02:11,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11" (1/1) ... [2019-10-14 22:02:11,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11" (1/1) ... [2019-10-14 22:02:11,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11" (1/1) ... [2019-10-14 22:02:11,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:11,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:11,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:11,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:11,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:11,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:11,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:11,562 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:11,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:11,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:11,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:11,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:13,098 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:13,098 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:13,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:13 BoogieIcfgContainer [2019-10-14 22:02:13,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:13,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:13,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:13,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:13,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:10" (1/3) ... [2019-10-14 22:02:13,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f020cba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:13, skipping insertion in model container [2019-10-14 22:02:13,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:11" (2/3) ... [2019-10-14 22:02:13,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f020cba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:13, skipping insertion in model container [2019-10-14 22:02:13,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:13" (3/3) ... [2019-10-14 22:02:13,121 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label43.c [2019-10-14 22:02:13,134 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:13,145 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:13,157 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:13,201 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:13,201 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:13,201 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:13,202 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:13,202 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:13,202 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:13,202 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:13,202 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 22:02:13,248 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:13,249 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:13,252 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1143384842, now seen corresponding path program 1 times [2019-10-14 22:02:13,270 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:13,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496096613] [2019-10-14 22:02:13,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:13,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:13,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:13,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496096613] [2019-10-14 22:02:13,605 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:13,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:13,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009665506] [2019-10-14 22:02:13,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:13,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:13,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:13,629 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:16,292 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-14 22:02:16,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:16,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-14 22:02:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:16,320 INFO L225 Difference]: With dead ends: 886 [2019-10-14 22:02:16,321 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:16,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-14 22:02:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 22:02:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-14 22:02:16,436 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 21 [2019-10-14 22:02:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:16,437 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-14 22:02:16,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-14 22:02:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 22:02:16,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:16,444 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:16,444 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1758836454, now seen corresponding path program 1 times [2019-10-14 22:02:16,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:16,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729945400] [2019-10-14 22:02:16,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:16,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:16,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:16,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729945400] [2019-10-14 22:02:16,840 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:16,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:02:16,841 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401428594] [2019-10-14 22:02:16,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:16,847 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:16,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:16,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:16,848 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-14 22:02:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:18,833 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-14 22:02:18,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:02:18,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2019-10-14 22:02:18,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:18,841 INFO L225 Difference]: With dead ends: 1320 [2019-10-14 22:02:18,843 INFO L226 Difference]: Without dead ends: 768 [2019-10-14 22:02:18,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-14 22:02:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-14 22:02:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-14 22:02:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-14 22:02:18,880 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 107 [2019-10-14 22:02:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:18,881 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-14 22:02:18,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-14 22:02:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 22:02:18,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:18,886 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:18,887 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:18,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1887369717, now seen corresponding path program 1 times [2019-10-14 22:02:18,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:18,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102524436] [2019-10-14 22:02:18,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:18,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:18,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:19,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102524436] [2019-10-14 22:02:19,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949846453] [2019-10-14 22:02:19,158 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 [2019-10-14 22:02:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:19,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:19,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:19,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:19,339 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144874412] [2019-10-14 22:02:19,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:19,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:19,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:19,350 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-14 22:02:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:20,231 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-10-14 22:02:20,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:20,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2019-10-14 22:02:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:20,240 INFO L225 Difference]: With dead ends: 1680 [2019-10-14 22:02:20,240 INFO L226 Difference]: Without dead ends: 1120 [2019-10-14 22:02:20,242 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:20,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-14 22:02:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-10-14 22:02:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-14 22:02:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-10-14 22:02:20,279 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 116 [2019-10-14 22:02:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:20,280 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-10-14 22:02:20,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-10-14 22:02:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-14 22:02:20,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:20,287 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:20,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:20,495 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:20,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1771960234, now seen corresponding path program 1 times [2019-10-14 22:02:20,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:20,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533933149] [2019-10-14 22:02:20,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:21,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533933149] [2019-10-14 22:02:21,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645239426] [2019-10-14 22:02:21,489 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 [2019-10-14 22:02:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:21,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:21,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 22:02:21,780 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:21,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-14 22:02:21,780 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269698663] [2019-10-14 22:02:21,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:21,781 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:21,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:21,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:02:21,782 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 5 states. [2019-10-14 22:02:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:23,040 INFO L93 Difference]: Finished difference Result 2080 states and 2868 transitions. [2019-10-14 22:02:23,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:23,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2019-10-14 22:02:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:23,052 INFO L225 Difference]: With dead ends: 2080 [2019-10-14 22:02:23,052 INFO L226 Difference]: Without dead ends: 1152 [2019-10-14 22:02:23,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-10-14 22:02:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2019-10-14 22:02:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1132. [2019-10-14 22:02:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2019-10-14 22:02:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1500 transitions. [2019-10-14 22:02:23,123 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1500 transitions. Word has length 219 [2019-10-14 22:02:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:23,126 INFO L462 AbstractCegarLoop]: Abstraction has 1132 states and 1500 transitions. [2019-10-14 22:02:23,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1500 transitions. [2019-10-14 22:02:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-10-14 22:02:23,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:23,137 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:23,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:23,350 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:23,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1331053746, now seen corresponding path program 1 times [2019-10-14 22:02:23,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:23,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961861880] [2019-10-14 22:02:23,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 52 proven. 237 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:24,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961861880] [2019-10-14 22:02:24,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403263723] [2019-10-14 22:02:24,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 22:02:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:24,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:24,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:24,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 228 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 22:02:24,705 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:24,706 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:02:24,706 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860194956] [2019-10-14 22:02:24,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:24,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:24,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:24,711 INFO L87 Difference]: Start difference. First operand 1132 states and 1500 transitions. Second operand 16 states. [2019-10-14 22:02:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:28,695 INFO L93 Difference]: Finished difference Result 2565 states and 3399 transitions. [2019-10-14 22:02:28,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 22:02:28,696 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 303 [2019-10-14 22:02:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:28,704 INFO L225 Difference]: With dead ends: 2565 [2019-10-14 22:02:28,704 INFO L226 Difference]: Without dead ends: 1392 [2019-10-14 22:02:28,708 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 22:02:28,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2019-10-14 22:02:28,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1324. [2019-10-14 22:02:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1324 states. [2019-10-14 22:02:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1573 transitions. [2019-10-14 22:02:28,748 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1573 transitions. Word has length 303 [2019-10-14 22:02:28,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:28,749 INFO L462 AbstractCegarLoop]: Abstraction has 1324 states and 1573 transitions. [2019-10-14 22:02:28,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:02:28,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1573 transitions. [2019-10-14 22:02:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-10-14 22:02:28,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:28,755 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:28,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:28,959 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1828566909, now seen corresponding path program 1 times [2019-10-14 22:02:28,960 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:28,960 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037540807] [2019-10-14 22:02:28,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:28,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:28,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 210 proven. 8 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 22:02:29,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037540807] [2019-10-14 22:02:29,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227435078] [2019-10-14 22:02:29,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 22:02:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:30,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:30,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:02:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-14 22:02:30,251 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:30,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-10-14 22:02:30,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021769315] [2019-10-14 22:02:30,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:30,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:30,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:02:30,253 INFO L87 Difference]: Start difference. First operand 1324 states and 1573 transitions. Second operand 5 states. [2019-10-14 22:02:31,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:31,311 INFO L93 Difference]: Finished difference Result 3408 states and 4139 transitions. [2019-10-14 22:02:31,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:31,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2019-10-14 22:02:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:31,327 INFO L225 Difference]: With dead ends: 3408 [2019-10-14 22:02:31,327 INFO L226 Difference]: Without dead ends: 2090 [2019-10-14 22:02:31,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 331 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:02:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2019-10-14 22:02:31,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1892. [2019-10-14 22:02:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1892 states. [2019-10-14 22:02:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2254 transitions. [2019-10-14 22:02:31,391 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2254 transitions. Word has length 328 [2019-10-14 22:02:31,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:31,392 INFO L462 AbstractCegarLoop]: Abstraction has 1892 states and 2254 transitions. [2019-10-14 22:02:31,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:31,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2254 transitions. [2019-10-14 22:02:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2019-10-14 22:02:31,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:31,401 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:31,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:31,605 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:31,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1277138289, now seen corresponding path program 1 times [2019-10-14 22:02:31,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:31,607 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378088190] [2019-10-14 22:02:31,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:31,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:31,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 315 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-14 22:02:32,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378088190] [2019-10-14 22:02:32,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294182226] [2019-10-14 22:02:32,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:32,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:32,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:32,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:02:32,757 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:32,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:02:32,758 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115090606] [2019-10-14 22:02:32,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:02:32,759 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:02:32,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:02:32,760 INFO L87 Difference]: Start difference. First operand 1892 states and 2254 transitions. Second operand 11 states. [2019-10-14 22:02:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:35,345 INFO L93 Difference]: Finished difference Result 4180 states and 5149 transitions. [2019-10-14 22:02:35,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 22:02:35,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 438 [2019-10-14 22:02:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:35,356 INFO L225 Difference]: With dead ends: 4180 [2019-10-14 22:02:35,356 INFO L226 Difference]: Without dead ends: 2476 [2019-10-14 22:02:35,360 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 455 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:02:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2019-10-14 22:02:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2464. [2019-10-14 22:02:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2464 states. [2019-10-14 22:02:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 3005 transitions. [2019-10-14 22:02:35,427 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 3005 transitions. Word has length 438 [2019-10-14 22:02:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:35,428 INFO L462 AbstractCegarLoop]: Abstraction has 2464 states and 3005 transitions. [2019-10-14 22:02:35,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:02:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 3005 transitions. [2019-10-14 22:02:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2019-10-14 22:02:35,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:35,439 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:35,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:35,652 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash 251334581, now seen corresponding path program 1 times [2019-10-14 22:02:35,653 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:35,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203538364] [2019-10-14 22:02:35,653 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:35,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:35,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 168 proven. 310 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-10-14 22:02:36,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203538364] [2019-10-14 22:02:36,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217793680] [2019-10-14 22:02:36,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 22:02:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:36,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:36,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 519 proven. 2 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 22:02:36,862 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:36,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-14 22:02:36,863 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143040040] [2019-10-14 22:02:36,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 22:02:36,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:36,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 22:02:36,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:36,871 INFO L87 Difference]: Start difference. First operand 2464 states and 3005 transitions. Second operand 13 states. [2019-10-14 22:02:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:40,851 INFO L93 Difference]: Finished difference Result 5880 states and 7242 transitions. [2019-10-14 22:02:40,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 22:02:40,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 456 [2019-10-14 22:02:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:40,867 INFO L225 Difference]: With dead ends: 5880 [2019-10-14 22:02:40,867 INFO L226 Difference]: Without dead ends: 3606 [2019-10-14 22:02:40,873 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 485 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 22:02:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2019-10-14 22:02:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3220. [2019-10-14 22:02:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3220 states. [2019-10-14 22:02:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 3803 transitions. [2019-10-14 22:02:40,958 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 3803 transitions. Word has length 456 [2019-10-14 22:02:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:40,959 INFO L462 AbstractCegarLoop]: Abstraction has 3220 states and 3803 transitions. [2019-10-14 22:02:40,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 22:02:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 3803 transitions. [2019-10-14 22:02:40,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2019-10-14 22:02:40,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:40,966 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:41,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:41,179 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:41,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash -263331539, now seen corresponding path program 1 times [2019-10-14 22:02:41,180 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:41,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308600702] [2019-10-14 22:02:41,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 388 proven. 93 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2019-10-14 22:02:43,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308600702] [2019-10-14 22:02:43,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171790809] [2019-10-14 22:02:43,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 22:02:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:02:43,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:43,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 704 proven. 2 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2019-10-14 22:02:43,698 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:43,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:02:43,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589932408] [2019-10-14 22:02:43,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:02:43,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:02:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:43,700 INFO L87 Difference]: Start difference. First operand 3220 states and 3803 transitions. Second operand 12 states. [2019-10-14 22:02:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:45,857 INFO L93 Difference]: Finished difference Result 6358 states and 7567 transitions. [2019-10-14 22:02:45,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 22:02:45,858 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 540 [2019-10-14 22:02:45,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:45,871 INFO L225 Difference]: With dead ends: 6358 [2019-10-14 22:02:45,872 INFO L226 Difference]: Without dead ends: 3287 [2019-10-14 22:02:45,878 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 560 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:02:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2019-10-14 22:02:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 3214. [2019-10-14 22:02:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3214 states. [2019-10-14 22:02:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 3658 transitions. [2019-10-14 22:02:45,949 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 3658 transitions. Word has length 540 [2019-10-14 22:02:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:45,950 INFO L462 AbstractCegarLoop]: Abstraction has 3214 states and 3658 transitions. [2019-10-14 22:02:45,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:02:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 3658 transitions. [2019-10-14 22:02:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2019-10-14 22:02:45,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:45,963 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:46,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:46,177 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:46,178 INFO L82 PathProgramCache]: Analyzing trace with hash -672082510, now seen corresponding path program 1 times [2019-10-14 22:02:46,178 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:46,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144083010] [2019-10-14 22:02:46,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:46,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:46,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat