/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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:07:54,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:07:54,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:07:54,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:07:54,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:07:54,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:07:54,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:07:54,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:07:54,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:07:54,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:07:54,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:07:54,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:07:54,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:07:54,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:07:54,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:07:54,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:07:54,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:07:54,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:07:54,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:07:54,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:07:54,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:07:54,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:07:54,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:07:54,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:07:54,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:07:54,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:07:54,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:07:54,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:07:54,739 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 19:07:54,764 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:07:54,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:07:54,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:07:54,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:07:54,767 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:07:54,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:07:54,768 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:07:54,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:07:54,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:07:54,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:07:54,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:07:54,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:07:54,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:07:54,771 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:07:54,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:07:54,771 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:07:54,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:07:54,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:07:54,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:07:54,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:07:54,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:07:54,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:54,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:07:54,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:07:54,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:07:54,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:07:54,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:07:54,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:07:54,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:07:55,087 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:07:55,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:07:55,109 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:07:55,110 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:07:55,111 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:07:55,112 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-11-06 19:07:55,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaac5d00f/e873a00d3c82469880518f150acd7942/FLAGf929e403f [2019-11-06 19:07:55,826 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:07:55,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-11-06 19:07:55,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaac5d00f/e873a00d3c82469880518f150acd7942/FLAGf929e403f [2019-11-06 19:07:56,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaac5d00f/e873a00d3c82469880518f150acd7942 [2019-11-06 19:07:56,042 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:07:56,044 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:07:56,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:56,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:07:56,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:07:56,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:56" (1/1) ... [2019-11-06 19:07:56,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bcaf3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:56, skipping insertion in model container [2019-11-06 19:07:56,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:56" (1/1) ... [2019-11-06 19:07:56,062 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:07:56,131 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:07:56,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:56,999 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:07:57,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:57,181 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:07:57,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57 WrapperNode [2019-11-06 19:07:57,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:57,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:07:57,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:07:57,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:07:57,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:07:57,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:07:57,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:07:57,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:07:57,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (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 19:07:57,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:07:57,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:07:57,457 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:07:57,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:07:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:07:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:07:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:07:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:07:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:07:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:07:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:07:59,602 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:07:59,603 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:07:59,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:59 BoogieIcfgContainer [2019-11-06 19:07:59,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:07:59,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:07:59,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:07:59,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:07:59,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:07:56" (1/3) ... [2019-11-06 19:07:59,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b32c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:59, skipping insertion in model container [2019-11-06 19:07:59,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (2/3) ... [2019-11-06 19:07:59,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b32c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:59, skipping insertion in model container [2019-11-06 19:07:59,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:59" (3/3) ... [2019-11-06 19:07:59,615 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label10.c [2019-11-06 19:07:59,629 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:07:59,640 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:07:59,657 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:07:59,686 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:07:59,687 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:07:59,687 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:07:59,687 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:07:59,687 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:07:59,688 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:07:59,688 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:07:59,688 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:07:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:07:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 19:07:59,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:59,724 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] [2019-11-06 19:07:59,726 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash 734030971, now seen corresponding path program 1 times [2019-11-06 19:07:59,743 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:59,744 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414897185] [2019-11-06 19:07:59,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:00,151 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 19:08:00,153 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414897185] [2019-11-06 19:08:00,155 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:00,155 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:08:00,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936510034] [2019-11-06 19:08:00,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:00,163 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:00,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:00,182 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:08:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:03,760 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-11-06 19:08:03,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:03,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-11-06 19:08:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:03,785 INFO L225 Difference]: With dead ends: 1009 [2019-11-06 19:08:03,785 INFO L226 Difference]: Without dead ends: 633 [2019-11-06 19:08:03,797 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 19:08:03,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-11-06 19:08:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-11-06 19:08:03,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-11-06 19:08:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-11-06 19:08:03,899 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 28 [2019-11-06 19:08:03,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:03,900 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-11-06 19:08:03,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-11-06 19:08:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 19:08:03,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:03,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:03,911 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1011694458, now seen corresponding path program 1 times [2019-11-06 19:08:03,913 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:03,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968854632] [2019-11-06 19:08:03,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:04,280 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968854632] [2019-11-06 19:08:04,281 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:04,281 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:08:04,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215172674] [2019-11-06 19:08:04,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:08:04,284 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:04,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:08:04,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:08:04,285 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-11-06 19:08:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:07,344 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-11-06 19:08:07,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:08:07,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 100 [2019-11-06 19:08:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:07,360 INFO L225 Difference]: With dead ends: 2436 [2019-11-06 19:08:07,360 INFO L226 Difference]: Without dead ends: 1816 [2019-11-06 19:08:07,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:08:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-11-06 19:08:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-11-06 19:08:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-11-06 19:08:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2527 transitions. [2019-11-06 19:08:07,493 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2527 transitions. Word has length 100 [2019-11-06 19:08:07,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:07,494 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2527 transitions. [2019-11-06 19:08:07,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:08:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2527 transitions. [2019-11-06 19:08:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 19:08:07,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:07,506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:07,507 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:07,507 INFO L82 PathProgramCache]: Analyzing trace with hash -356402163, now seen corresponding path program 1 times [2019-11-06 19:08:07,507 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:07,508 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249603391] [2019-11-06 19:08:07,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:07,762 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249603391] [2019-11-06 19:08:07,762 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081018697] [2019-11-06 19:08:07,763 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 19:08:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:07,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:07,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:07,938 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:07,938 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:07,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382962765] [2019-11-06 19:08:07,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:07,939 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:07,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:07,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:07,940 INFO L87 Difference]: Start difference. First operand 1777 states and 2527 transitions. Second operand 3 states. [2019-11-06 19:08:08,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:08,975 INFO L93 Difference]: Finished difference Result 4128 states and 5882 transitions. [2019-11-06 19:08:08,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:08,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2019-11-06 19:08:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:08,991 INFO L225 Difference]: With dead ends: 4128 [2019-11-06 19:08:08,991 INFO L226 Difference]: Without dead ends: 2357 [2019-11-06 19:08:08,997 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:09,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-11-06 19:08:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2349. [2019-11-06 19:08:09,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-11-06 19:08:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3262 transitions. [2019-11-06 19:08:09,092 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3262 transitions. Word has length 101 [2019-11-06 19:08:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:09,093 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3262 transitions. [2019-11-06 19:08:09,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:09,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3262 transitions. [2019-11-06 19:08:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 19:08:09,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:09,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:09,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:09,303 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:09,303 INFO L82 PathProgramCache]: Analyzing trace with hash 306354774, now seen corresponding path program 1 times [2019-11-06 19:08:09,303 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:09,304 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298198317] [2019-11-06 19:08:09,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:09,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298198317] [2019-11-06 19:08:09,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585330436] [2019-11-06 19:08:09,521 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 19:08:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:09,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:09,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:09,709 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:09,709 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:09,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206196273] [2019-11-06 19:08:09,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:09,710 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:09,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:09,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:09,711 INFO L87 Difference]: Start difference. First operand 2349 states and 3262 transitions. Second operand 3 states. [2019-11-06 19:08:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:10,718 INFO L93 Difference]: Finished difference Result 4704 states and 6572 transitions. [2019-11-06 19:08:10,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:10,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2019-11-06 19:08:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:10,732 INFO L225 Difference]: With dead ends: 4704 [2019-11-06 19:08:10,733 INFO L226 Difference]: Without dead ends: 2361 [2019-11-06 19:08:10,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2019-11-06 19:08:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2349. [2019-11-06 19:08:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-11-06 19:08:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3200 transitions. [2019-11-06 19:08:10,799 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3200 transitions. Word has length 102 [2019-11-06 19:08:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:10,800 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3200 transitions. [2019-11-06 19:08:10,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:10,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3200 transitions. [2019-11-06 19:08:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 19:08:10,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:10,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:11,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:11,006 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:11,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1268458330, now seen corresponding path program 1 times [2019-11-06 19:08:11,006 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:11,007 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618365822] [2019-11-06 19:08:11,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:11,258 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618365822] [2019-11-06 19:08:11,258 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:11,259 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:08:11,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646207562] [2019-11-06 19:08:11,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:08:11,260 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:11,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:08:11,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:11,261 INFO L87 Difference]: Start difference. First operand 2349 states and 3200 transitions. Second operand 7 states. [2019-11-06 19:08:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:13,629 INFO L93 Difference]: Finished difference Result 6927 states and 10053 transitions. [2019-11-06 19:08:13,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:08:13,630 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-11-06 19:08:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:13,653 INFO L225 Difference]: With dead ends: 6927 [2019-11-06 19:08:13,654 INFO L226 Difference]: Without dead ends: 4584 [2019-11-06 19:08:13,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:08:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2019-11-06 19:08:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4339. [2019-11-06 19:08:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4339 states. [2019-11-06 19:08:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 5749 transitions. [2019-11-06 19:08:13,772 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 5749 transitions. Word has length 126 [2019-11-06 19:08:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:13,772 INFO L462 AbstractCegarLoop]: Abstraction has 4339 states and 5749 transitions. [2019-11-06 19:08:13,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:08:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 5749 transitions. [2019-11-06 19:08:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 19:08:13,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:13,776 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:13,776 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1769948106, now seen corresponding path program 1 times [2019-11-06 19:08:13,777 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:13,777 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427544442] [2019-11-06 19:08:13,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:14,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427544442] [2019-11-06 19:08:14,011 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100374006] [2019-11-06 19:08:14,011 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 19:08:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:14,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:08:14,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:14,140 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:14,140 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-06 19:08:14,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097814030] [2019-11-06 19:08:14,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:14,142 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:14,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:14,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:14,142 INFO L87 Difference]: Start difference. First operand 4339 states and 5749 transitions. Second operand 8 states. [2019-11-06 19:08:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:16,583 INFO L93 Difference]: Finished difference Result 10686 states and 15152 transitions. [2019-11-06 19:08:16,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:08:16,584 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 173 [2019-11-06 19:08:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:16,615 INFO L225 Difference]: With dead ends: 10686 [2019-11-06 19:08:16,616 INFO L226 Difference]: Without dead ends: 6353 [2019-11-06 19:08:16,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6353 states. [2019-11-06 19:08:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 6072. [2019-11-06 19:08:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6072 states. [2019-11-06 19:08:16,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 7774 transitions. [2019-11-06 19:08:16,837 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 7774 transitions. Word has length 173 [2019-11-06 19:08:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:16,838 INFO L462 AbstractCegarLoop]: Abstraction has 6072 states and 7774 transitions. [2019-11-06 19:08:16,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:08:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 7774 transitions. [2019-11-06 19:08:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-06 19:08:16,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:16,842 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:17,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:17,052 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:17,052 INFO L82 PathProgramCache]: Analyzing trace with hash 651997042, now seen corresponding path program 1 times [2019-11-06 19:08:17,052 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:17,053 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513236456] [2019-11-06 19:08:17,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:08:17,323 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513236456] [2019-11-06 19:08:17,323 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745801413] [2019-11-06 19:08:17,323 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 19:08:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:17,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 19:08:17,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:08:17,497 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:17,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:17,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050156205] [2019-11-06 19:08:17,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:17,499 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:17,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:17,499 INFO L87 Difference]: Start difference. First operand 6072 states and 7774 transitions. Second operand 3 states. [2019-11-06 19:08:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:18,922 INFO L93 Difference]: Finished difference Result 13284 states and 16998 transitions. [2019-11-06 19:08:18,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:18,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-11-06 19:08:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:18,959 INFO L225 Difference]: With dead ends: 13284 [2019-11-06 19:08:18,959 INFO L226 Difference]: Without dead ends: 7218 [2019-11-06 19:08:18,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7218 states. [2019-11-06 19:08:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7218 to 6462. [2019-11-06 19:08:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6462 states. [2019-11-06 19:08:19,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 8221 transitions. [2019-11-06 19:08:19,132 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 8221 transitions. Word has length 191 [2019-11-06 19:08:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:19,133 INFO L462 AbstractCegarLoop]: Abstraction has 6462 states and 8221 transitions. [2019-11-06 19:08:19,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 8221 transitions. [2019-11-06 19:08:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-06 19:08:19,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:19,139 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:08:19,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:19,345 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2031643392, now seen corresponding path program 1 times [2019-11-06 19:08:19,346 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:19,346 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204235583] [2019-11-06 19:08:19,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 41 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:08:19,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204235583] [2019-11-06 19:08:19,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352779041] [2019-11-06 19:08:19,713 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 19:08:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:19,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:08:19,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:19,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-06 19:08:19,967 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:19,969 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2019-11-06 19:08:19,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655240340] [2019-11-06 19:08:19,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:19,970 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:19,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:08:19,971 INFO L87 Difference]: Start difference. First operand 6462 states and 8221 transitions. Second operand 5 states. [2019-11-06 19:08:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:21,801 INFO L93 Difference]: Finished difference Result 12989 states and 16642 transitions. [2019-11-06 19:08:21,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:08:21,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 195 [2019-11-06 19:08:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:21,832 INFO L225 Difference]: With dead ends: 12989 [2019-11-06 19:08:21,833 INFO L226 Difference]: Without dead ends: 6533 [2019-11-06 19:08:21,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:08:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2019-11-06 19:08:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 6500. [2019-11-06 19:08:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6500 states. [2019-11-06 19:08:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 8312 transitions. [2019-11-06 19:08:21,990 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 8312 transitions. Word has length 195 [2019-11-06 19:08:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:21,992 INFO L462 AbstractCegarLoop]: Abstraction has 6500 states and 8312 transitions. [2019-11-06 19:08:21,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 8312 transitions. [2019-11-06 19:08:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 19:08:21,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:21,997 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:22,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:22,208 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065224, now seen corresponding path program 1 times [2019-11-06 19:08:22,209 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:22,209 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849319254] [2019-11-06 19:08:22,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:22,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849319254] [2019-11-06 19:08:22,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371276376] [2019-11-06 19:08:22,655 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 19:08:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:22,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:22,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:22,827 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:22,827 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:08:22,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571646432] [2019-11-06 19:08:22,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:08:22,829 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:22,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:08:22,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:08:22,829 INFO L87 Difference]: Start difference. First operand 6500 states and 8312 transitions. Second operand 11 states. [2019-11-06 19:08:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:26,420 INFO L93 Difference]: Finished difference Result 14922 states and 20088 transitions. [2019-11-06 19:08:26,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 19:08:26,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 230 [2019-11-06 19:08:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:26,449 INFO L225 Difference]: With dead ends: 14922 [2019-11-06 19:08:26,449 INFO L226 Difference]: Without dead ends: 8428 [2019-11-06 19:08:26,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2019-11-06 19:08:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2019-11-06 19:08:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8268. [2019-11-06 19:08:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8268 states. [2019-11-06 19:08:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8268 states to 8268 states and 10473 transitions. [2019-11-06 19:08:26,642 INFO L78 Accepts]: Start accepts. Automaton has 8268 states and 10473 transitions. Word has length 230 [2019-11-06 19:08:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:26,643 INFO L462 AbstractCegarLoop]: Abstraction has 8268 states and 10473 transitions. [2019-11-06 19:08:26,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:08:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8268 states and 10473 transitions. [2019-11-06 19:08:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-11-06 19:08:26,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:26,649 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:08:26,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:26,862 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:26,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2138370387, now seen corresponding path program 1 times [2019-11-06 19:08:26,862 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:26,863 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136773081] [2019-11-06 19:08:26,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 114 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:27,369 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136773081] [2019-11-06 19:08:27,369 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817965738] [2019-11-06 19:08:27,369 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 19:08:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:27,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 19:08:27,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:27,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:27,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:27,707 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2019-11-06 19:08:27,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:27,995 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:27,995 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-06 19:08:27,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38138902] [2019-11-06 19:08:27,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 19:08:27,997 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:27,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 19:08:27,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:08:27,997 INFO L87 Difference]: Start difference. First operand 8268 states and 10473 transitions. Second operand 15 states. [2019-11-06 19:08:29,004 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2019-11-06 19:08:30,673 WARN L191 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28