/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/Problem11_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:08:09,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:08:09,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:08:09,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:08:09,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:08:09,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:08:09,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:08:09,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:08:09,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:08:09,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:08:09,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:08:09,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:08:09,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:08:09,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:08:09,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:08:09,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:08:09,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:08:09,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:08:09,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:08:09,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:08:09,972 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 19:08:09,998 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:08:09,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:08:09,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:08:09,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:08:10,000 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:08:10,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:08:10,000 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:08:10,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:08:10,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:08:10,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:08:10,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:08:10,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:08:10,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:08:10,001 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:08:10,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:08:10,002 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:08:10,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:08:10,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:08:10,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:08:10,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:08:10,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:08:10,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:08:10,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:08:10,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:08:10,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:08:10,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:08:10,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:08:10,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:08:10,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:08:10,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:08:10,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:08:10,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:08:10,305 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:08:10,305 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:08:10,306 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label15.c [2019-11-06 19:08:10,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6be95531/d2e3d0a4896c4313a5ccf627b1962347/FLAG0c51d7999 [2019-11-06 19:08:10,970 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:08:10,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label15.c [2019-11-06 19:08:10,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6be95531/d2e3d0a4896c4313a5ccf627b1962347/FLAG0c51d7999 [2019-11-06 19:08:11,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6be95531/d2e3d0a4896c4313a5ccf627b1962347 [2019-11-06 19:08:11,209 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:08:11,211 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:08:11,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:11,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:08:11,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:08:11,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:11" (1/1) ... [2019-11-06 19:08:11,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@adc654d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:11, skipping insertion in model container [2019-11-06 19:08:11,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:11" (1/1) ... [2019-11-06 19:08:11,228 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:08:11,304 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:08:12,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:12,218 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:08:12,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:12,398 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:08:12,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12 WrapperNode [2019-11-06 19:08:12,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:12,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:08:12,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:08:12,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:08:12,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12" (1/1) ... [2019-11-06 19:08:12,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12" (1/1) ... [2019-11-06 19:08:12,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12" (1/1) ... [2019-11-06 19:08:12,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12" (1/1) ... [2019-11-06 19:08:12,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12" (1/1) ... [2019-11-06 19:08:12,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12" (1/1) ... [2019-11-06 19:08:12,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12" (1/1) ... [2019-11-06 19:08:12,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:08:12,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:08:12,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:08:12,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:08:12,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12" (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 19:08:12,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:08:12,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:08:12,674 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:08:12,674 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:08:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:08:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:08:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:08:12,675 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:08:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:08:12,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:08:12,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:08:14,559 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:08:14,560 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:08:14,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:14 BoogieIcfgContainer [2019-11-06 19:08:14,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:08:14,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:08:14,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:08:14,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:08:14,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:08:11" (1/3) ... [2019-11-06 19:08:14,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efc7fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:14, skipping insertion in model container [2019-11-06 19:08:14,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:12" (2/3) ... [2019-11-06 19:08:14,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efc7fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:14, skipping insertion in model container [2019-11-06 19:08:14,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:14" (3/3) ... [2019-11-06 19:08:14,580 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label15.c [2019-11-06 19:08:14,591 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:08:14,600 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:08:14,612 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:08:14,653 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:08:14,654 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:08:14,655 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:08:14,655 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:08:14,656 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:08:14,656 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:08:14,656 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:08:14,656 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:08:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:08:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 19:08:14,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:14,699 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] [2019-11-06 19:08:14,701 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:14,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:14,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1453317925, now seen corresponding path program 1 times [2019-11-06 19:08:14,716 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:14,717 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508604442] [2019-11-06 19:08:14,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:15,047 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 19:08:15,048 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508604442] [2019-11-06 19:08:15,049 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:15,049 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:08:15,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055700683] [2019-11-06 19:08:15,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:15,058 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:15,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:15,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:15,074 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:08:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:18,573 INFO L93 Difference]: Finished difference Result 993 states and 1777 transitions. [2019-11-06 19:08:18,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:18,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-06 19:08:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:18,595 INFO L225 Difference]: With dead ends: 993 [2019-11-06 19:08:18,595 INFO L226 Difference]: Without dead ends: 632 [2019-11-06 19:08:18,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-11-06 19:08:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 628. [2019-11-06 19:08:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-11-06 19:08:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions. [2019-11-06 19:08:18,712 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 20 [2019-11-06 19:08:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:18,713 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 886 transitions. [2019-11-06 19:08:18,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions. [2019-11-06 19:08:18,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 19:08:18,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:18,724 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:08:18,724 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1546422986, now seen corresponding path program 1 times [2019-11-06 19:08:18,725 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:18,726 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259575563] [2019-11-06 19:08:18,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:19,135 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259575563] [2019-11-06 19:08:19,135 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:19,135 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:08:19,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192168766] [2019-11-06 19:08:19,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:19,138 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:19,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:19,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:19,139 INFO L87 Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 8 states. [2019-11-06 19:08:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:22,094 INFO L93 Difference]: Finished difference Result 1873 states and 2696 transitions. [2019-11-06 19:08:22,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:08:22,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2019-11-06 19:08:22,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:22,103 INFO L225 Difference]: With dead ends: 1873 [2019-11-06 19:08:22,104 INFO L226 Difference]: Without dead ends: 1251 [2019-11-06 19:08:22,106 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-11-06 19:08:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1226. [2019-11-06 19:08:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2019-11-06 19:08:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1619 transitions. [2019-11-06 19:08:22,163 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1619 transitions. Word has length 100 [2019-11-06 19:08:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:22,164 INFO L462 AbstractCegarLoop]: Abstraction has 1226 states and 1619 transitions. [2019-11-06 19:08:22,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:08:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1619 transitions. [2019-11-06 19:08:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 19:08:22,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:22,168 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:22,169 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1386273764, now seen corresponding path program 1 times [2019-11-06 19:08:22,170 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:22,170 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781999559] [2019-11-06 19:08:22,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:22,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781999559] [2019-11-06 19:08:22,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992237168] [2019-11-06 19:08:22,412 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 19:08:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:22,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:22,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:22,650 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:22,650 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:22,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003383301] [2019-11-06 19:08:22,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:22,652 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:22,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:22,652 INFO L87 Difference]: Start difference. First operand 1226 states and 1619 transitions. Second operand 3 states. [2019-11-06 19:08:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:23,782 INFO L93 Difference]: Finished difference Result 3612 states and 4883 transitions. [2019-11-06 19:08:23,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:23,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2019-11-06 19:08:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:23,799 INFO L225 Difference]: With dead ends: 3612 [2019-11-06 19:08:23,800 INFO L226 Difference]: Without dead ends: 2392 [2019-11-06 19:08:23,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 154 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 19:08:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2019-11-06 19:08:23,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2189. [2019-11-06 19:08:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2189 states. [2019-11-06 19:08:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2912 transitions. [2019-11-06 19:08:23,925 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2912 transitions. Word has length 151 [2019-11-06 19:08:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:23,931 INFO L462 AbstractCegarLoop]: Abstraction has 2189 states and 2912 transitions. [2019-11-06 19:08:23,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2912 transitions. [2019-11-06 19:08:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-06 19:08:23,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:23,941 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:24,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:24,147 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:24,148 INFO L82 PathProgramCache]: Analyzing trace with hash 782773517, now seen corresponding path program 1 times [2019-11-06 19:08:24,148 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:24,148 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624814224] [2019-11-06 19:08:24,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 26 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:08:24,588 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624814224] [2019-11-06 19:08:24,589 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79050505] [2019-11-06 19:08:24,589 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 19:08:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:08:24,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 19:08:24,814 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:24,814 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:08:24,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064710722] [2019-11-06 19:08:24,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:24,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:24,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:24,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:08:24,818 INFO L87 Difference]: Start difference. First operand 2189 states and 2912 transitions. Second operand 5 states. [2019-11-06 19:08:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:26,466 INFO L93 Difference]: Finished difference Result 5406 states and 7546 transitions. [2019-11-06 19:08:26,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:26,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-11-06 19:08:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:26,494 INFO L225 Difference]: With dead ends: 5406 [2019-11-06 19:08:26,495 INFO L226 Difference]: Without dead ends: 3223 [2019-11-06 19:08:26,501 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:08:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2019-11-06 19:08:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3183. [2019-11-06 19:08:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2019-11-06 19:08:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4270 transitions. [2019-11-06 19:08:26,592 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4270 transitions. Word has length 186 [2019-11-06 19:08:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:26,593 INFO L462 AbstractCegarLoop]: Abstraction has 3183 states and 4270 transitions. [2019-11-06 19:08:26,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4270 transitions. [2019-11-06 19:08:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-06 19:08:26,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:26,597 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 19:08:26,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:26,802 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2027682720, now seen corresponding path program 1 times [2019-11-06 19:08:26,803 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:26,804 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282989676] [2019-11-06 19:08:26,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:08:27,268 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282989676] [2019-11-06 19:08:27,268 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815140989] [2019-11-06 19:08:27,268 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 19:08:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:08:27,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:27,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 19:08:27,506 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:27,507 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2019-11-06 19:08:27,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48808971] [2019-11-06 19:08:27,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:27,508 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:27,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:27,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:08:27,508 INFO L87 Difference]: Start difference. First operand 3183 states and 4270 transitions. Second operand 5 states. [2019-11-06 19:08:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:29,090 INFO L93 Difference]: Finished difference Result 6423 states and 8722 transitions. [2019-11-06 19:08:29,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:29,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-11-06 19:08:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:29,111 INFO L225 Difference]: With dead ends: 6423 [2019-11-06 19:08:29,111 INFO L226 Difference]: Without dead ends: 3434 [2019-11-06 19:08:29,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:08:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2019-11-06 19:08:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3407. [2019-11-06 19:08:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3407 states. [2019-11-06 19:08:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4566 transitions. [2019-11-06 19:08:29,230 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4566 transitions. Word has length 187 [2019-11-06 19:08:29,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:29,230 INFO L462 AbstractCegarLoop]: Abstraction has 3407 states and 4566 transitions. [2019-11-06 19:08:29,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:29,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4566 transitions. [2019-11-06 19:08:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 19:08:29,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:29,236 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:08:29,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:29,441 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:29,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1231270553, now seen corresponding path program 1 times [2019-11-06 19:08:29,443 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:29,443 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693517869] [2019-11-06 19:08:29,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 106 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:29,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693517869] [2019-11-06 19:08:29,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358020844] [2019-11-06 19:08:29,753 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 19:08:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 19:08:29,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:29,998 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:30,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:30,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:30,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:30,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:30,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:30,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:30,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:39,187 WARN L191 SmtUtils]: Spent 9.09 s on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2019-11-06 19:08:39,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:39,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:39,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:39,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:39,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:42,893 WARN L191 SmtUtils]: Spent 3.51 s on a formula simplification. DAG size of input: 131 DAG size of output: 61 [2019-11-06 19:08:42,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 27 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:43,109 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:43,110 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-06 19:08:43,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136139932] [2019-11-06 19:08:43,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 19:08:43,111 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:43,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 19:08:43,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:08:43,112 INFO L87 Difference]: Start difference. First operand 3407 states and 4566 transitions. Second operand 15 states. [2019-11-06 19:08:43,540 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2019-11-06 19:08:46,361 WARN L191 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 43 DAG size of output: 40