/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:46,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:46,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:46,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:14:46,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:14:46,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:14:46,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:14:46,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:14:46,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:14:46,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:14:46,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:14:46,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:14:46,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:14:46,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:14:46,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:14:46,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:14:46,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:14:46,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:46,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:46,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:46,673 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 19:14:46,692 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:46,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:46,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:46,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:46,694 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:46,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:46,694 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:46,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:46,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:46,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:46,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:46,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:46,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:46,696 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:46,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:46,696 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:46,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:46,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:46,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:46,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:46,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:46,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:46,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:46,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:46,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:46,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:46,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:46,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:46,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:46,961 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:46,973 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:46,977 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:46,978 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:46,979 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:46,979 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label50.c [2019-11-06 19:14:47,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67d456fdf/05d19c5871a04e02a54a62724f3818c6/FLAG9b068c330 [2019-11-06 19:14:47,655 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:47,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label50.c [2019-11-06 19:14:47,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67d456fdf/05d19c5871a04e02a54a62724f3818c6/FLAG9b068c330 [2019-11-06 19:14:47,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67d456fdf/05d19c5871a04e02a54a62724f3818c6 [2019-11-06 19:14:47,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:47,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:47,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:47,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:47,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:47,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:47" (1/1) ... [2019-11-06 19:14:47,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db58337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:47, skipping insertion in model container [2019-11-06 19:14:47,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:47" (1/1) ... [2019-11-06 19:14:47,952 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:48,001 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:48,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:48,617 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:48,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:48,778 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:48,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48 WrapperNode [2019-11-06 19:14:48,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:48,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:48,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:48,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:48,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48" (1/1) ... [2019-11-06 19:14:48,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48" (1/1) ... [2019-11-06 19:14:48,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48" (1/1) ... [2019-11-06 19:14:48,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48" (1/1) ... [2019-11-06 19:14:48,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48" (1/1) ... [2019-11-06 19:14:48,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48" (1/1) ... [2019-11-06 19:14:48,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48" (1/1) ... [2019-11-06 19:14:48,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:48,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:48,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:48,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:48,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48" (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 19:14:49,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:49,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:49,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:49,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:49,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:49,039 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:49,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:14:50,748 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:14:50,748 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:14:50,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:50 BoogieIcfgContainer [2019-11-06 19:14:50,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:14:50,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:14:50,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:14:50,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:14:50,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:47" (1/3) ... [2019-11-06 19:14:50,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e356a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:50, skipping insertion in model container [2019-11-06 19:14:50,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:48" (2/3) ... [2019-11-06 19:14:50,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e356a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:50, skipping insertion in model container [2019-11-06 19:14:50,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:50" (3/3) ... [2019-11-06 19:14:50,761 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label50.c [2019-11-06 19:14:50,771 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:14:50,778 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:14:50,789 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:14:50,816 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:14:50,817 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:14:50,817 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:14:50,817 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:14:50,817 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:14:50,817 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:14:50,818 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:14:50,818 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:14:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:14:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 19:14:50,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:50,858 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:50,861 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:50,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1557712066, now seen corresponding path program 1 times [2019-11-06 19:14:50,879 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:50,879 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478792308] [2019-11-06 19:14:50,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:51,270 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 19:14:51,271 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478792308] [2019-11-06 19:14:51,272 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:51,272 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:14:51,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261929150] [2019-11-06 19:14:51,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:51,280 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:51,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:51,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:14:51,297 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:14:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:54,138 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-11-06 19:14:54,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:14:54,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2019-11-06 19:14:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:54,165 INFO L225 Difference]: With dead ends: 886 [2019-11-06 19:14:54,165 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:14:54,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:54,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:14:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-11-06 19:14:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-06 19:14:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-11-06 19:14:54,319 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 43 [2019-11-06 19:14:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:54,320 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-11-06 19:14:54,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-11-06 19:14:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 19:14:54,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:54,328 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:54,329 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1883069890, now seen corresponding path program 1 times [2019-11-06 19:14:54,329 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:54,330 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707254849] [2019-11-06 19:14:54,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:54,670 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707254849] [2019-11-06 19:14:54,671 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:54,671 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:14:54,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728671753] [2019-11-06 19:14:54,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:14:54,674 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:14:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:14:54,675 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-11-06 19:14:56,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:56,608 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-11-06 19:14:56,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:14:56,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 129 [2019-11-06 19:14:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:56,619 INFO L225 Difference]: With dead ends: 1320 [2019-11-06 19:14:56,619 INFO L226 Difference]: Without dead ends: 768 [2019-11-06 19:14:56,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-11-06 19:14:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-11-06 19:14:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-11-06 19:14:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-11-06 19:14:56,655 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 129 [2019-11-06 19:14:56,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:56,655 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-11-06 19:14:56,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:14:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-11-06 19:14:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 19:14:56,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:56,660 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:56,660 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1079220531, now seen corresponding path program 1 times [2019-11-06 19:14:56,661 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:56,661 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265017616] [2019-11-06 19:14:56,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:56,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265017616] [2019-11-06 19:14:56,948 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441959790] [2019-11-06 19:14:56,949 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 19:14:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:57,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:57,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:57,162 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:57,163 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:57,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159711438] [2019-11-06 19:14:57,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:57,169 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:57,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:57,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:57,170 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-11-06 19:14:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:58,104 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-11-06 19:14:58,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:58,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-11-06 19:14:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:58,112 INFO L225 Difference]: With dead ends: 1680 [2019-11-06 19:14:58,112 INFO L226 Difference]: Without dead ends: 1120 [2019-11-06 19:14:58,114 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 141 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 19:14:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-11-06 19:14:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-11-06 19:14:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-11-06 19:14:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-11-06 19:14:58,147 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 138 [2019-11-06 19:14:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:58,148 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-11-06 19:14:58,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-11-06 19:14:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-06 19:14:58,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:58,154 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:58,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:58,360 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash 209442382, now seen corresponding path program 1 times [2019-11-06 19:14:58,361 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:58,362 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801340213] [2019-11-06 19:14:58,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-06 19:14:58,692 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801340213] [2019-11-06 19:14:58,693 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975796324] [2019-11-06 19:14:58,693 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 19:14:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:58,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:58,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-06 19:14:58,874 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:58,875 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:58,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073483254] [2019-11-06 19:14:58,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:58,878 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:58,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:58,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:58,879 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-11-06 19:14:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:59,853 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-11-06 19:14:59,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:59,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2019-11-06 19:14:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:59,864 INFO L225 Difference]: With dead ends: 2414 [2019-11-06 19:14:59,864 INFO L226 Difference]: Without dead ends: 1486 [2019-11-06 19:14:59,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 246 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 19:14:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-11-06 19:14:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-11-06 19:14:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-11-06 19:14:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-11-06 19:14:59,911 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 241 [2019-11-06 19:14:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:59,912 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-11-06 19:14:59,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-11-06 19:14:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-11-06 19:14:59,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:59,918 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:15:00,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:00,123 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:00,123 INFO L82 PathProgramCache]: Analyzing trace with hash 157930481, now seen corresponding path program 1 times [2019-11-06 19:15:00,123 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:00,124 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017904648] [2019-11-06 19:15:00,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:15:00,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017904648] [2019-11-06 19:15:00,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428293828] [2019-11-06 19:15:00,392 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 19:15:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:00,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:15:00,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:15:00,682 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:00,683 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:15:00,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722833701] [2019-11-06 19:15:00,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:15:00,684 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:00,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:15:00,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:15:00,685 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-11-06 19:15:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:01,564 INFO L93 Difference]: Finished difference Result 3156 states and 4345 transitions. [2019-11-06 19:15:01,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:15:01,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 260 [2019-11-06 19:15:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:01,577 INFO L225 Difference]: With dead ends: 3156 [2019-11-06 19:15:01,577 INFO L226 Difference]: Without dead ends: 1858 [2019-11-06 19:15:01,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 265 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 19:15:01,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-11-06 19:15:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-11-06 19:15:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-11-06 19:15:01,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2323 transitions. [2019-11-06 19:15:01,642 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2323 transitions. Word has length 260 [2019-11-06 19:15:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:01,643 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2323 transitions. [2019-11-06 19:15:01,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:15:01,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2323 transitions. [2019-11-06 19:15:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2019-11-06 19:15:01,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:01,651 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:15:01,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:01,863 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:01,864 INFO L82 PathProgramCache]: Analyzing trace with hash 762391661, now seen corresponding path program 1 times [2019-11-06 19:15:01,864 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:01,865 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453161319] [2019-11-06 19:15:01,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 143 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:15:03,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453161319] [2019-11-06 19:15:03,045 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234452324] [2019-11-06 19:15:03,045 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 19:15:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:03,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:15:03,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:03,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:15:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 19:15:03,349 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:03,350 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-11-06 19:15:03,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146888421] [2019-11-06 19:15:03,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:03,351 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:03,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:15:03,353 INFO L87 Difference]: Start difference. First operand 1674 states and 2323 transitions. Second operand 5 states. [2019-11-06 19:15:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:04,879 INFO L93 Difference]: Finished difference Result 3926 states and 5450 transitions. [2019-11-06 19:15:04,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:04,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 274 [2019-11-06 19:15:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:04,892 INFO L225 Difference]: With dead ends: 3926 [2019-11-06 19:15:04,892 INFO L226 Difference]: Without dead ends: 2258 [2019-11-06 19:15:04,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 276 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:15:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2019-11-06 19:15:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 2066. [2019-11-06 19:15:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2066 states. [2019-11-06 19:15:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 2766 transitions. [2019-11-06 19:15:04,959 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 2766 transitions. Word has length 274 [2019-11-06 19:15:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:04,959 INFO L462 AbstractCegarLoop]: Abstraction has 2066 states and 2766 transitions. [2019-11-06 19:15:04,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 2766 transitions. [2019-11-06 19:15:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2019-11-06 19:15:04,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:04,968 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:05,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:05,172 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:05,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1515376597, now seen corresponding path program 1 times [2019-11-06 19:15:05,174 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:05,174 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585695106] [2019-11-06 19:15:05,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 118 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:15:06,455 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585695106] [2019-11-06 19:15:06,455 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115752415] [2019-11-06 19:15:06,456 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 19:15:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:06,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:15:06,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:06,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 298 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 19:15:06,950 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:06,950 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:15:06,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552774996] [2019-11-06 19:15:06,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:15:06,952 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:06,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:15:06,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:15:06,952 INFO L87 Difference]: Start difference. First operand 2066 states and 2766 transitions. Second operand 16 states. [2019-11-06 19:15:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:12,898 INFO L93 Difference]: Finished difference Result 4262 states and 5767 transitions. [2019-11-06 19:15:12,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 19:15:12,898 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 358 [2019-11-06 19:15:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:12,910 INFO L225 Difference]: With dead ends: 4262 [2019-11-06 19:15:12,910 INFO L226 Difference]: Without dead ends: 2339 [2019-11-06 19:15:12,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:15:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2019-11-06 19:15:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2262. [2019-11-06 19:15:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2262 states. [2019-11-06 19:15:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 2757 transitions. [2019-11-06 19:15:13,000 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 2757 transitions. Word has length 358 [2019-11-06 19:15:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:13,000 INFO L462 AbstractCegarLoop]: Abstraction has 2262 states and 2757 transitions. [2019-11-06 19:15:13,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 19:15:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 2757 transitions. [2019-11-06 19:15:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2019-11-06 19:15:13,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:13,012 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:13,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:13,224 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:13,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:13,224 INFO L82 PathProgramCache]: Analyzing trace with hash -784745466, now seen corresponding path program 1 times [2019-11-06 19:15:13,224 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:13,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466442435] [2019-11-06 19:15:13,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 289 proven. 41 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 19:15:14,288 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466442435] [2019-11-06 19:15:14,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804768994] [2019-11-06 19:15:14,289 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 19:15:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:14,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:15:14,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:14,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:15:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2019-11-06 19:15:14,583 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:15:14,583 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-11-06 19:15:14,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301397632] [2019-11-06 19:15:14,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:14,585 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:14,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:14,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:15:14,585 INFO L87 Difference]: Start difference. First operand 2262 states and 2757 transitions. Second operand 5 states. [2019-11-06 19:15:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:15,966 INFO L93 Difference]: Finished difference Result 4354 states and 5361 transitions. [2019-11-06 19:15:15,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:15:15,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 383 [2019-11-06 19:15:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:15,977 INFO L225 Difference]: With dead ends: 4354 [2019-11-06 19:15:15,977 INFO L226 Difference]: Without dead ends: 2282 [2019-11-06 19:15:15,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 387 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:15:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2019-11-06 19:15:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2278. [2019-11-06 19:15:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-11-06 19:15:16,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2708 transitions. [2019-11-06 19:15:16,035 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2708 transitions. Word has length 383 [2019-11-06 19:15:16,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:16,036 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 2708 transitions. [2019-11-06 19:15:16,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:16,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2708 transitions. [2019-11-06 19:15:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2019-11-06 19:15:16,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:16,048 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:16,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:16,253 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:16,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1555619278, now seen corresponding path program 1 times [2019-11-06 19:15:16,254 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:16,254 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899594586] [2019-11-06 19:15:16,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 370 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-06 19:15:17,125 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899594586] [2019-11-06 19:15:17,125 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359468801] [2019-11-06 19:15:17,125 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 19:15:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:17,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:15:17,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 658 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2019-11-06 19:15:17,503 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:17,503 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-11-06 19:15:17,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049525714] [2019-11-06 19:15:17,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:15:17,505 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:15:17,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:15:17,505 INFO L87 Difference]: Start difference. First operand 2278 states and 2708 transitions. Second operand 9 states. [2019-11-06 19:15:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:19,671 INFO L93 Difference]: Finished difference Result 4564 states and 5442 transitions. [2019-11-06 19:15:19,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:15:19,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 493 [2019-11-06 19:15:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:19,682 INFO L225 Difference]: With dead ends: 4564 [2019-11-06 19:15:19,682 INFO L226 Difference]: Without dead ends: 2476 [2019-11-06 19:15:19,687 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 506 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:15:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2019-11-06 19:15:19,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2284. [2019-11-06 19:15:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2019-11-06 19:15:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2614 transitions. [2019-11-06 19:15:19,741 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2614 transitions. Word has length 493 [2019-11-06 19:15:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:19,742 INFO L462 AbstractCegarLoop]: Abstraction has 2284 states and 2614 transitions. [2019-11-06 19:15:19,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:15:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2614 transitions. [2019-11-06 19:15:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2019-11-06 19:15:19,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:19,759 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:19,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:19,963 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:19,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:19,964 INFO L82 PathProgramCache]: Analyzing trace with hash 962890010, now seen corresponding path program 1 times [2019-11-06 19:15:19,964 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:19,965 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108359938] [2019-11-06 19:15:19,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 498 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-11-06 19:15:21,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108359938] [2019-11-06 19:15:21,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940198305] [2019-11-06 19:15:21,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:15:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:21,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 19:15:21,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:15:21,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:15:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 865 proven. 2 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2019-11-06 19:15:22,484 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:15:22,485 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-11-06 19:15:22,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029460353] [2019-11-06 19:15:22,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:15:22,487 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:22,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:15:22,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:15:22,488 INFO L87 Difference]: Start difference. First operand 2284 states and 2614 transitions. Second operand 12 states.