/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/Problem16_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:39,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:39,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:39,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:19:39,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:19:39,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:19:39,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:19:39,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:19:39,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:19:39,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:19:39,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:19:39,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:19:39,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:39,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:39,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:39,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:39,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:39,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:39,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:39,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:39,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:39,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:39,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:39,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:39,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:39,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:39,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:39,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:39,549 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 19:19:39,580 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:39,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:39,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:39,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:39,582 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:39,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:39,582 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:39,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:39,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:39,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:39,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:39,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:39,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:39,583 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:39,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:39,584 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:39,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:39,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:39,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:39,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:39,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:39,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:39,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:39,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:39,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:39,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:39,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:39,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:39,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:39,853 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:39,872 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:39,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:39,878 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:39,878 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:39,879 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-11-06 19:19:39,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a43760e75/722386b185014f14b68a8fc036e68506/FLAG99a0eb2d6 [2019-11-06 19:19:40,601 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:40,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-11-06 19:19:40,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a43760e75/722386b185014f14b68a8fc036e68506/FLAG99a0eb2d6 [2019-11-06 19:19:40,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a43760e75/722386b185014f14b68a8fc036e68506 [2019-11-06 19:19:40,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:40,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:40,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:40,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:40,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:40,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:40" (1/1) ... [2019-11-06 19:19:40,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36629faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:40, skipping insertion in model container [2019-11-06 19:19:40,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:40" (1/1) ... [2019-11-06 19:19:40,797 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:40,874 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:41,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:41,872 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:42,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:42,146 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:42,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42 WrapperNode [2019-11-06 19:19:42,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:42,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:42,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:42,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:42,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (1/1) ... [2019-11-06 19:19:42,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:42,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:42,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:42,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:42,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (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 19:19:42,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:42,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:42,408 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:42,408 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:42,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:44,787 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:44,787 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:44,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:44 BoogieIcfgContainer [2019-11-06 19:19:44,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:44,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:44,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:44,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:44,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:40" (1/3) ... [2019-11-06 19:19:44,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bee5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:44, skipping insertion in model container [2019-11-06 19:19:44,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:42" (2/3) ... [2019-11-06 19:19:44,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bee5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:44, skipping insertion in model container [2019-11-06 19:19:44,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:44" (3/3) ... [2019-11-06 19:19:44,801 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label58.c [2019-11-06 19:19:44,811 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:44,819 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:44,831 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:44,869 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:44,870 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:44,870 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:44,870 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:44,870 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:44,870 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:44,870 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:44,871 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 19:19:44,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:44,917 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:44,918 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:44,924 INFO L82 PathProgramCache]: Analyzing trace with hash -129772806, now seen corresponding path program 1 times [2019-11-06 19:19:44,934 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:44,934 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820002822] [2019-11-06 19:19:44,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:45,319 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 19:19:45,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820002822] [2019-11-06 19:19:45,320 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:45,321 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:45,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037724732] [2019-11-06 19:19:45,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:45,328 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:45,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:45,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:45,345 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:50,645 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:19:50,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:50,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-11-06 19:19:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:50,673 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:19:50,674 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:50,684 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 19:19:50,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-11-06 19:19:50,818 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 57 [2019-11-06 19:19:50,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:50,821 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-11-06 19:19:50,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-11-06 19:19:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 19:19:50,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:50,848 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2019-11-06 19:19:50,848 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1170986303, now seen corresponding path program 1 times [2019-11-06 19:19:50,849 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:50,849 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619292344] [2019-11-06 19:19:50,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 100 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:51,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619292344] [2019-11-06 19:19:51,408 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220593410] [2019-11-06 19:19:51,408 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 19:19:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:51,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:51,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 19:19:51,688 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:51,689 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:19:51,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670803402] [2019-11-06 19:19:51,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:51,695 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:51,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:51,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:51,696 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-11-06 19:19:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:55,028 INFO L93 Difference]: Finished difference Result 3131 states and 5147 transitions. [2019-11-06 19:19:55,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:55,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2019-11-06 19:19:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:55,045 INFO L225 Difference]: With dead ends: 3131 [2019-11-06 19:19:55,045 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 19:19:55,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:19:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 19:19:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078. [2019-11-06 19:19:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-11-06 19:19:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3239 transitions. [2019-11-06 19:19:55,134 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3239 transitions. Word has length 224 [2019-11-06 19:19:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:55,137 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3239 transitions. [2019-11-06 19:19:55,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3239 transitions. [2019-11-06 19:19:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-06 19:19:55,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:55,143 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2019-11-06 19:19:55,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:55,356 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:55,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:55,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1948862471, now seen corresponding path program 1 times [2019-11-06 19:19:55,356 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:55,356 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74524164] [2019-11-06 19:19:55,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 100 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:55,672 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74524164] [2019-11-06 19:19:55,672 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208046991] [2019-11-06 19:19:55,672 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 19:19:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:55,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:55,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 19:19:55,843 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:55,843 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:55,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688861720] [2019-11-06 19:19:55,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:55,845 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:55,845 INFO L87 Difference]: Start difference. First operand 2078 states and 3239 transitions. Second operand 5 states. [2019-11-06 19:19:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:58,626 INFO L93 Difference]: Finished difference Result 6302 states and 10079 transitions. [2019-11-06 19:19:58,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:58,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2019-11-06 19:19:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:58,664 INFO L225 Difference]: With dead ends: 6302 [2019-11-06 19:19:58,665 INFO L226 Difference]: Without dead ends: 4230 [2019-11-06 19:19:58,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:58,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-11-06 19:19:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-11-06 19:19:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-11-06 19:19:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5867 transitions. [2019-11-06 19:19:58,803 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5867 transitions. Word has length 228 [2019-11-06 19:19:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:58,804 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5867 transitions. [2019-11-06 19:19:58,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5867 transitions. [2019-11-06 19:19:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2019-11-06 19:19:58,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:58,813 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:19:59,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:59,018 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash 151732998, now seen corresponding path program 1 times [2019-11-06 19:19:59,018 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:59,018 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476966815] [2019-11-06 19:19:59,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 231 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:19:59,512 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476966815] [2019-11-06 19:19:59,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879543377] [2019-11-06 19:19:59,513 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 19:19:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:59,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:59,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 354 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 19:19:59,794 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:59,794 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:19:59,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952974584] [2019-11-06 19:19:59,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:59,797 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:59,798 INFO L87 Difference]: Start difference. First operand 4208 states and 5867 transitions. Second operand 11 states. [2019-11-06 19:20:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:04,168 INFO L93 Difference]: Finished difference Result 10864 states and 15765 transitions. [2019-11-06 19:20:04,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:20:04,169 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 347 [2019-11-06 19:20:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:04,202 INFO L225 Difference]: With dead ends: 10864 [2019-11-06 19:20:04,203 INFO L226 Difference]: Without dead ends: 6662 [2019-11-06 19:20:04,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 354 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:20:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-11-06 19:20:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4591. [2019-11-06 19:20:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4591 states. [2019-11-06 19:20:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 6444 transitions. [2019-11-06 19:20:04,348 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 6444 transitions. Word has length 347 [2019-11-06 19:20:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:04,349 INFO L462 AbstractCegarLoop]: Abstraction has 4591 states and 6444 transitions. [2019-11-06 19:20:04,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:20:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 6444 transitions. [2019-11-06 19:20:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2019-11-06 19:20:04,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:04,360 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 19:20:04,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:20:04,563 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:04,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:04,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2030428242, now seen corresponding path program 1 times [2019-11-06 19:20:04,565 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:04,565 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21016953] [2019-11-06 19:20:04,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 150 proven. 221 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-06 19:20:05,080 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21016953] [2019-11-06 19:20:05,081 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045107432] [2019-11-06 19:20:05,081 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 19:20:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:05,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:20:05,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-11-06 19:20:05,399 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:20:05,399 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:20:05,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366790990] [2019-11-06 19:20:05,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:20:05,400 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:20:05,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:20:05,401 INFO L87 Difference]: Start difference. First operand 4591 states and 6444 transitions. Second operand 5 states. [2019-11-06 19:20:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:08,273 INFO L93 Difference]: Finished difference Result 10581 states and 14860 transitions. [2019-11-06 19:20:08,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:20:08,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 423 [2019-11-06 19:20:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:08,299 INFO L225 Difference]: With dead ends: 10581 [2019-11-06 19:20:08,300 INFO L226 Difference]: Without dead ends: 5996 [2019-11-06 19:20:08,310 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 425 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:20:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2019-11-06 19:20:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5968. [2019-11-06 19:20:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5968 states. [2019-11-06 19:20:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 7680 transitions. [2019-11-06 19:20:08,441 INFO L78 Accepts]: Start accepts. Automaton has 5968 states and 7680 transitions. Word has length 423 [2019-11-06 19:20:08,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:08,442 INFO L462 AbstractCegarLoop]: Abstraction has 5968 states and 7680 transitions. [2019-11-06 19:20:08,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:20:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5968 states and 7680 transitions. [2019-11-06 19:20:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2019-11-06 19:20:08,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:08,458 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:08,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:20:08,661 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:08,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:08,662 INFO L82 PathProgramCache]: Analyzing trace with hash -603942422, now seen corresponding path program 1 times [2019-11-06 19:20:08,662 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:08,662 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188856337] [2019-11-06 19:20:08,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 266 proven. 114 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-06 19:20:09,450 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188856337] [2019-11-06 19:20:09,450 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447562645] [2019-11-06 19:20:09,450 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 19:20:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:09,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:20:09,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 443 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 19:20:10,122 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:20:10,122 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:20:10,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417174676] [2019-11-06 19:20:10,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:20:10,125 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:10,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:20:10,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:20:10,126 INFO L87 Difference]: Start difference. First operand 5968 states and 7680 transitions. Second operand 11 states.