/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/eca-rers2012/Problem14_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:12:58,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:12:58,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:12:58,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:12:58,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:12:58,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:12:58,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:12:58,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:12:58,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:12:58,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:12:58,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:12:58,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:12:58,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:12:58,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:12:58,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:12:58,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:12:58,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:12:58,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:12:58,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:12:58,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:12:58,477 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 [2019-11-06 19:12:58,498 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:12:58,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:12:58,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:12:58,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:12:58,500 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:12:58,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:12:58,501 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:12:58,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:12:58,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:12:58,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:12:58,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:12:58,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:12:58,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:12:58,503 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:12:58,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:12:58,504 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:12:58,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:12:58,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:12:58,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:12:58,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:12:58,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:12:58,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:12:58,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:12:58,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:12:58,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:12:58,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:12:58,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:12:58,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:12:58,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:12:58,802 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:12:58,814 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:12:58,818 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:12:58,820 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:12:58,820 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:12:58,821 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label17.c [2019-11-06 19:12:58,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0879ba05/36f61e79fbd54b6e800e5e0ba907695c/FLAGc0cf0de81 [2019-11-06 19:12:59,478 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:12:59,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label17.c [2019-11-06 19:12:59,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0879ba05/36f61e79fbd54b6e800e5e0ba907695c/FLAGc0cf0de81 [2019-11-06 19:12:59,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0879ba05/36f61e79fbd54b6e800e5e0ba907695c [2019-11-06 19:12:59,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:12:59,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:12:59,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:59,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:12:59,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:12:59,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:59" (1/1) ... [2019-11-06 19:12:59,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc8cdaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:59, skipping insertion in model container [2019-11-06 19:12:59,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:59" (1/1) ... [2019-11-06 19:12:59,767 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:12:59,825 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:13:00,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:00,400 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:13:00,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:00,586 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:13:00,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00 WrapperNode [2019-11-06 19:13:00,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:13:00,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:13:00,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:13:00,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:13:00,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00" (1/1) ... [2019-11-06 19:13:00,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00" (1/1) ... [2019-11-06 19:13:00,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00" (1/1) ... [2019-11-06 19:13:00,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00" (1/1) ... [2019-11-06 19:13:00,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00" (1/1) ... [2019-11-06 19:13:00,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00" (1/1) ... [2019-11-06 19:13:00,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00" (1/1) ... [2019-11-06 19:13:00,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:13:00,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:13:00,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:13:00,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:13:00,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00" (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 [2019-11-06 19:13:00,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:13:00,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:13:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:13:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:13:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:13:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:13:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:13:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:13:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:13:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:13:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:13:02,409 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:13:02,413 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:13:02,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:02 BoogieIcfgContainer [2019-11-06 19:13:02,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:13:02,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:13:02,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:13:02,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:13:02,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:12:59" (1/3) ... [2019-11-06 19:13:02,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486cecf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:02, skipping insertion in model container [2019-11-06 19:13:02,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:00" (2/3) ... [2019-11-06 19:13:02,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486cecf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:02, skipping insertion in model container [2019-11-06 19:13:02,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:02" (3/3) ... [2019-11-06 19:13:02,430 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label17.c [2019-11-06 19:13:02,444 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:13:02,454 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:13:02,467 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:13:02,505 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:13:02,505 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:13:02,507 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:13:02,507 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:13:02,507 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:13:02,507 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:13:02,507 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:13:02,508 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:13:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:13:02,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 19:13:02,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:02,555 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:13:02,557 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:02,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:02,563 INFO L82 PathProgramCache]: Analyzing trace with hash -950257557, now seen corresponding path program 1 times [2019-11-06 19:13:02,570 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:02,570 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532451887] [2019-11-06 19:13:02,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:02,923 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532451887] [2019-11-06 19:13:02,924 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:02,924 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:13:02,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24568176] [2019-11-06 19:13:02,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:02,931 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:13:02,951 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:13:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:05,365 INFO L93 Difference]: Finished difference Result 886 states and 1611 transitions. [2019-11-06 19:13:05,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:13:05,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2019-11-06 19:13:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:05,388 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:13:05,388 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:13:05,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:05,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:13:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-11-06 19:13:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-11-06 19:13:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 848 transitions. [2019-11-06 19:13:05,500 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 848 transitions. Word has length 62 [2019-11-06 19:13:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:05,501 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 848 transitions. [2019-11-06 19:13:05,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 848 transitions. [2019-11-06 19:13:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 19:13:05,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:05,509 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:13:05,510 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash -955889055, now seen corresponding path program 1 times [2019-11-06 19:13:05,510 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:05,511 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802911786] [2019-11-06 19:13:05,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:05,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802911786] [2019-11-06 19:13:05,781 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:05,781 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:13:05,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260186756] [2019-11-06 19:13:05,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:13:05,784 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:05,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:13:05,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:05,785 INFO L87 Difference]: Start difference. First operand 560 states and 848 transitions. Second operand 9 states. [2019-11-06 19:13:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:07,875 INFO L93 Difference]: Finished difference Result 1702 states and 2664 transitions. [2019-11-06 19:13:07,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:13:07,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 141 [2019-11-06 19:13:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:07,886 INFO L225 Difference]: With dead ends: 1702 [2019-11-06 19:13:07,886 INFO L226 Difference]: Without dead ends: 1148 [2019-11-06 19:13:07,889 INFO L630 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 [2019-11-06 19:13:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2019-11-06 19:13:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1124. [2019-11-06 19:13:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-11-06 19:13:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1609 transitions. [2019-11-06 19:13:07,955 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1609 transitions. Word has length 141 [2019-11-06 19:13:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:07,956 INFO L462 AbstractCegarLoop]: Abstraction has 1124 states and 1609 transitions. [2019-11-06 19:13:07,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:13:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1609 transitions. [2019-11-06 19:13:07,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 19:13:07,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:07,962 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:13:07,962 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:07,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1117315654, now seen corresponding path program 1 times [2019-11-06 19:13:07,963 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:07,963 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923593876] [2019-11-06 19:13:07,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:08,350 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923593876] [2019-11-06 19:13:08,351 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513130075] [2019-11-06 19:13:08,351 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 [2019-11-06 19:13:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:08,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:08,595 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:08,595 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:13:08,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200104560] [2019-11-06 19:13:08,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:08,603 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:08,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:08,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:08,605 INFO L87 Difference]: Start difference. First operand 1124 states and 1609 transitions. Second operand 3 states. [2019-11-06 19:13:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:09,454 INFO L93 Difference]: Finished difference Result 2242 states and 3218 transitions. [2019-11-06 19:13:09,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:09,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2019-11-06 19:13:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:09,473 INFO L225 Difference]: With dead ends: 2242 [2019-11-06 19:13:09,473 INFO L226 Difference]: Without dead ends: 1124 [2019-11-06 19:13:09,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2019-11-06 19:13:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2019-11-06 19:13:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-11-06 19:13:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1477 transitions. [2019-11-06 19:13:09,524 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1477 transitions. Word has length 174 [2019-11-06 19:13:09,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:09,526 INFO L462 AbstractCegarLoop]: Abstraction has 1124 states and 1477 transitions. [2019-11-06 19:13:09,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:09,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1477 transitions. [2019-11-06 19:13:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-06 19:13:09,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:09,532 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:13:09,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:09,738 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:09,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1496526325, now seen corresponding path program 1 times [2019-11-06 19:13:09,739 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:09,739 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311808831] [2019-11-06 19:13:09,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:10,086 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311808831] [2019-11-06 19:13:10,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:10,086 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:13:10,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986352465] [2019-11-06 19:13:10,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:13:10,088 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:13:10,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:13:10,088 INFO L87 Difference]: Start difference. First operand 1124 states and 1477 transitions. Second operand 8 states. [2019-11-06 19:13:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:12,057 INFO L93 Difference]: Finished difference Result 2850 states and 3834 transitions. [2019-11-06 19:13:12,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:13:12,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 179 [2019-11-06 19:13:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:12,067 INFO L225 Difference]: With dead ends: 2850 [2019-11-06 19:13:12,068 INFO L226 Difference]: Without dead ends: 1732 [2019-11-06 19:13:12,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:13:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2019-11-06 19:13:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1514. [2019-11-06 19:13:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-11-06 19:13:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1946 transitions. [2019-11-06 19:13:12,128 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1946 transitions. Word has length 179 [2019-11-06 19:13:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:12,129 INFO L462 AbstractCegarLoop]: Abstraction has 1514 states and 1946 transitions. [2019-11-06 19:13:12,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:13:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1946 transitions. [2019-11-06 19:13:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-11-06 19:13:12,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:12,135 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:13:12,135 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:12,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1091080375, now seen corresponding path program 1 times [2019-11-06 19:13:12,136 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:12,136 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514382862] [2019-11-06 19:13:12,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-06 19:13:12,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514382862] [2019-11-06 19:13:12,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776703581] [2019-11-06 19:13:12,520 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 [2019-11-06 19:13:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:12,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:12,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:13:12,783 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:12,783 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-11-06 19:13:12,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697932931] [2019-11-06 19:13:12,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:12,785 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:12,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:12,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:13:12,786 INFO L87 Difference]: Start difference. First operand 1514 states and 1946 transitions. Second operand 3 states. [2019-11-06 19:13:13,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:13,565 INFO L93 Difference]: Finished difference Result 3768 states and 4949 transitions. [2019-11-06 19:13:13,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:13,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2019-11-06 19:13:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:13,580 INFO L225 Difference]: With dead ends: 3768 [2019-11-06 19:13:13,580 INFO L226 Difference]: Without dead ends: 2260 [2019-11-06 19:13:13,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:13:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2019-11-06 19:13:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2019-11-06 19:13:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2260 states. [2019-11-06 19:13:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2918 transitions. [2019-11-06 19:13:13,643 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2918 transitions. Word has length 254 [2019-11-06 19:13:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:13,644 INFO L462 AbstractCegarLoop]: Abstraction has 2260 states and 2918 transitions. [2019-11-06 19:13:13,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2918 transitions. [2019-11-06 19:13:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-11-06 19:13:13,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:13,652 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:13:13,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:13,856 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:13,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1583973646, now seen corresponding path program 1 times [2019-11-06 19:13:13,857 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:13,858 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356613405] [2019-11-06 19:13:13,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:13:14,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356613405] [2019-11-06 19:13:14,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439845795] [2019-11-06 19:13:14,141 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 [2019-11-06 19:13:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:14,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:14,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:13:14,391 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:14,392 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:13:14,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442408099] [2019-11-06 19:13:14,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:14,394 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:14,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:14,400 INFO L87 Difference]: Start difference. First operand 2260 states and 2918 transitions. Second operand 3 states. [2019-11-06 19:13:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:15,217 INFO L93 Difference]: Finished difference Result 3730 states and 4827 transitions. [2019-11-06 19:13:15,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:15,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 285 [2019-11-06 19:13:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:15,237 INFO L225 Difference]: With dead ends: 3730 [2019-11-06 19:13:15,237 INFO L226 Difference]: Without dead ends: 3728 [2019-11-06 19:13:15,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2019-11-06 19:13:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2452. [2019-11-06 19:13:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2019-11-06 19:13:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3205 transitions. [2019-11-06 19:13:15,317 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3205 transitions. Word has length 285 [2019-11-06 19:13:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:15,318 INFO L462 AbstractCegarLoop]: Abstraction has 2452 states and 3205 transitions. [2019-11-06 19:13:15,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3205 transitions. [2019-11-06 19:13:15,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-11-06 19:13:15,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:15,327 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2019-11-06 19:13:15,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:15,533 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:15,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1358628013, now seen corresponding path program 1 times [2019-11-06 19:13:15,534 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:15,534 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765251048] [2019-11-06 19:13:15,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:13:15,837 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765251048] [2019-11-06 19:13:15,837 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697728537] [2019-11-06 19:13:15,837 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 [2019-11-06 19:13:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:15,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:15,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:13:16,024 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:16,024 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:13:16,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164911207] [2019-11-06 19:13:16,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:16,027 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:16,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:16,028 INFO L87 Difference]: Start difference. First operand 2452 states and 3205 transitions. Second operand 3 states. [2019-11-06 19:13:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:16,792 INFO L93 Difference]: Finished difference Result 3734 states and 4860 transitions. [2019-11-06 19:13:16,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:16,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 316 [2019-11-06 19:13:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:16,810 INFO L225 Difference]: With dead ends: 3734 [2019-11-06 19:13:16,810 INFO L226 Difference]: Without dead ends: 3732 [2019-11-06 19:13:16,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2019-11-06 19:13:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 2456. [2019-11-06 19:13:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2019-11-06 19:13:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3211 transitions. [2019-11-06 19:13:16,897 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3211 transitions. Word has length 316 [2019-11-06 19:13:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:16,898 INFO L462 AbstractCegarLoop]: Abstraction has 2456 states and 3211 transitions. [2019-11-06 19:13:16,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3211 transitions. [2019-11-06 19:13:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2019-11-06 19:13:16,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:16,938 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:17,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:17,142 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:17,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:17,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1418580514, now seen corresponding path program 1 times [2019-11-06 19:13:17,143 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:17,143 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171428557] [2019-11-06 19:13:17,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:13:17,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171428557] [2019-11-06 19:13:17,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628880185] [2019-11-06 19:13:17,505 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 [2019-11-06 19:13:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:17,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:13:17,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:17,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:13:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-06 19:13:17,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:17,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-11-06 19:13:17,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486723975] [2019-11-06 19:13:17,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:17,852 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:17,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:17,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:17,853 INFO L87 Difference]: Start difference. First operand 2456 states and 3211 transitions. Second operand 5 states. [2019-11-06 19:13:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:19,199 INFO L93 Difference]: Finished difference Result 5296 states and 6893 transitions. [2019-11-06 19:13:19,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:13:19,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2019-11-06 19:13:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:19,214 INFO L225 Difference]: With dead ends: 5296 [2019-11-06 19:13:19,214 INFO L226 Difference]: Without dead ends: 2846 [2019-11-06 19:13:19,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:13:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-11-06 19:13:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2832. [2019-11-06 19:13:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-11-06 19:13:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3616 transitions. [2019-11-06 19:13:19,309 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3616 transitions. Word has length 325 [2019-11-06 19:13:19,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:19,310 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3616 transitions. [2019-11-06 19:13:19,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3616 transitions. [2019-11-06 19:13:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2019-11-06 19:13:19,322 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:19,323 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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] [2019-11-06 19:13:19,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:19,527 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1540192005, now seen corresponding path program 1 times [2019-11-06 19:13:19,528 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:19,528 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216385976] [2019-11-06 19:13:19,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 175 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:13:20,741 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216385976] [2019-11-06 19:13:20,741 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055907728] [2019-11-06 19:13:20,741 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 [2019-11-06 19:13:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:20,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:13:20,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:20,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 336 proven. 53 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-06 19:13:21,271 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:21,271 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:13:21,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684824217] [2019-11-06 19:13:21,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:13:21,272 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:21,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:13:21,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:13:21,273 INFO L87 Difference]: Start difference. First operand 2832 states and 3616 transitions. Second operand 16 states. [2019-11-06 19:13:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:25,217 INFO L93 Difference]: Finished difference Result 5594 states and 7201 transitions. [2019-11-06 19:13:25,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 19:13:25,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 409 [2019-11-06 19:13:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:25,229 INFO L225 Difference]: With dead ends: 5594 [2019-11-06 19:13:25,229 INFO L226 Difference]: Without dead ends: 2903 [2019-11-06 19:13:25,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 19:13:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2019-11-06 19:13:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2830. [2019-11-06 19:13:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2830 states. [2019-11-06 19:13:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 3398 transitions. [2019-11-06 19:13:25,315 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 3398 transitions. Word has length 409 [2019-11-06 19:13:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:25,315 INFO L462 AbstractCegarLoop]: Abstraction has 2830 states and 3398 transitions. [2019-11-06 19:13:25,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:13:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 3398 transitions. [2019-11-06 19:13:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2019-11-06 19:13:25,332 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:25,332 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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] [2019-11-06 19:13:25,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:25,547 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:25,547 INFO L82 PathProgramCache]: Analyzing trace with hash -827518533, now seen corresponding path program 1 times [2019-11-06 19:13:25,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:25,548 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056870952] [2019-11-06 19:13:25,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 446 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:13:26,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056870952] [2019-11-06 19:13:26,224 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522042456] [2019-11-06 19:13:26,224 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 [2019-11-06 19:13:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:26,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:13:26,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 715 proven. 2 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-06 19:13:26,556 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:26,557 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:13:26,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588012947] [2019-11-06 19:13:26,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:13:26,558 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:26,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:13:26,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:13:26,559 INFO L87 Difference]: Start difference. First operand 2830 states and 3398 transitions. Second operand 9 states. [2019-11-06 19:13:28,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:28,735 INFO L93 Difference]: Finished difference Result 6762 states and 8216 transitions. [2019-11-06 19:13:28,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:13:28,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 544 [2019-11-06 19:13:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:28,757 INFO L225 Difference]: With dead ends: 6762 [2019-11-06 19:13:28,758 INFO L226 Difference]: Without dead ends: 4120 [2019-11-06 19:13:28,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 557 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:13:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2019-11-06 19:13:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3938. [2019-11-06 19:13:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3938 states. [2019-11-06 19:13:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 4589 transitions. [2019-11-06 19:13:28,877 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 4589 transitions. Word has length 544 [2019-11-06 19:13:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:28,877 INFO L462 AbstractCegarLoop]: Abstraction has 3938 states and 4589 transitions. [2019-11-06 19:13:28,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:13:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 4589 transitions. [2019-11-06 19:13:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2019-11-06 19:13:28,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:28,901 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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] [2019-11-06 19:13:29,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:29,118 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:29,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2081536532, now seen corresponding path program 1 times [2019-11-06 19:13:29,119 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:29,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867578249] [2019-11-06 19:13:29,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 593 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-11-06 19:13:30,917 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867578249] [2019-11-06 19:13:30,917 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873675751] [2019-11-06 19:13:30,917 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-11-06 19:13:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:31,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:13:31,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:31,130 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 941 proven. 2 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-11-06 19:13:31,525 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:31,525 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:13:31,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977710211] [2019-11-06 19:13:31,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:13:31,527 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:13:31,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:13:31,528 INFO L87 Difference]: Start difference. First operand 3938 states and 4589 transitions. Second operand 12 states. [2019-11-06 19:13:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:33,612 INFO L93 Difference]: Finished difference Result 7968 states and 9311 transitions. [2019-11-06 19:13:33,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:13:33,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 628 [2019-11-06 19:13:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:33,627 INFO L225 Difference]: With dead ends: 7968 [2019-11-06 19:13:33,628 INFO L226 Difference]: Without dead ends: 4179 [2019-11-06 19:13:33,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 647 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:13:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2019-11-06 19:13:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 3934. [2019-11-06 19:13:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3934 states. [2019-11-06 19:13:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 4428 transitions. [2019-11-06 19:13:33,714 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 4428 transitions. Word has length 628 [2019-11-06 19:13:33,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:33,715 INFO L462 AbstractCegarLoop]: Abstraction has 3934 states and 4428 transitions. [2019-11-06 19:13:33,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:13:33,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 4428 transitions. [2019-11-06 19:13:33,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2019-11-06 19:13:33,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:33,726 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 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] [2019-11-06 19:13:33,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:33,931 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1416962264, now seen corresponding path program 2 times [2019-11-06 19:13:33,932 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:33,932 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048961030] [2019-11-06 19:13:33,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 816 proven. 236 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-11-06 19:13:34,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048961030] [2019-11-06 19:13:34,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885311662] [2019-11-06 19:13:34,953 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 [2019-11-06 19:13:35,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 19:13:35,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 19:13:35,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:13:35,186 INFO L279 TraceCheckSpWp]: Computing forward predicates...