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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 17:00:29,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 17:00:29,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 17:00:29,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 17:00:29,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 17:00:29,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 17:00:29,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 17:00:29,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 17:00:29,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 17:00:29,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 17:00:29,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 17:00:29,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-10-02 17:00:29,832 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 17:00:29,853 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 17:00:29,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 17:00:29,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 17:00:29,857 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 17:00:29,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 17:00:29,858 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 17:00:29,858 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 17:00:29,858 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 17:00:29,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 17:00:29,858 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 17:00:29,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 17:00:29,859 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 17:00:29,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 17:00:29,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 17:00:29,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 17:00:29,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 17:00:29,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 17:00:29,861 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 17:00:29,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 17:00:29,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 17:00:29,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 17:00:29,862 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 17:00:29,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 17:00:29,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 17:00:29,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 17:00:29,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 17:00:29,863 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 17:00:29,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 17:00:29,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 17:00:29,863 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 17:00:29,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 17:00:29,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 17:00:29,914 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 17:00:29,915 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 17:00:29,916 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 17:00:29,917 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2019-10-02 17:00:29,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd0538414/1873fd2269c04384b42cedde0f4d5454/FLAGad615815f [2019-10-02 17:00:30,542 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 17:00:30,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2019-10-02 17:00:30,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd0538414/1873fd2269c04384b42cedde0f4d5454/FLAGad615815f [2019-10-02 17:00:30,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd0538414/1873fd2269c04384b42cedde0f4d5454 [2019-10-02 17:00:30,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 17:00:30,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 17:00:30,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 17:00:30,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 17:00:30,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 17:00:30,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:00:30" (1/1) ... [2019-10-02 17:00:30,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287e3a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:30, skipping insertion in model container [2019-10-02 17:00:30,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 05:00:30" (1/1) ... [2019-10-02 17:00:30,775 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 17:00:30,840 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 17:00:31,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:00:31,341 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 17:00:31,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 17:00:31,453 INFO L192 MainTranslator]: Completed translation [2019-10-02 17:00:31,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31 WrapperNode [2019-10-02 17:00:31,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 17:00:31,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 17:00:31,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 17:00:31,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 17:00:31,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31" (1/1) ... [2019-10-02 17:00:31,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31" (1/1) ... [2019-10-02 17:00:31,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31" (1/1) ... [2019-10-02 17:00:31,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31" (1/1) ... [2019-10-02 17:00:31,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31" (1/1) ... [2019-10-02 17:00:31,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31" (1/1) ... [2019-10-02 17:00:31,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31" (1/1) ... [2019-10-02 17:00:31,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 17:00:31,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 17:00:31,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 17:00:31,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 17:00:31,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31" (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 [2019-10-02 17:00:31,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 17:00:31,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 17:00:31,635 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 17:00:31,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 17:00:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 17:00:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 17:00:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 17:00:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 17:00:31,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 17:00:31,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 17:00:31,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 17:00:32,819 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 17:00:32,820 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 17:00:32,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:00:32 BoogieIcfgContainer [2019-10-02 17:00:32,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 17:00:32,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 17:00:32,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 17:00:32,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 17:00:32,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 05:00:30" (1/3) ... [2019-10-02 17:00:32,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73045fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:00:32, skipping insertion in model container [2019-10-02 17:00:32,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 05:00:31" (2/3) ... [2019-10-02 17:00:32,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73045fe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 05:00:32, skipping insertion in model container [2019-10-02 17:00:32,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 05:00:32" (3/3) ... [2019-10-02 17:00:32,830 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label50.c [2019-10-02 17:00:32,840 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 17:00:32,849 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 17:00:32,866 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 17:00:32,894 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 17:00:32,894 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 17:00:32,894 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 17:00:32,895 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 17:00:32,895 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 17:00:32,895 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 17:00:32,895 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 17:00:32,896 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 17:00:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-02 17:00:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-02 17:00:32,934 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:32,935 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:32,937 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1653547897, now seen corresponding path program 1 times [2019-10-02 17:00:32,945 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:32,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:32,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:32,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:32,997 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:33,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:33,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:00:33,417 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:33,426 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:00:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:00:33,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:33,450 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-02 17:00:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:34,439 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2019-10-02 17:00:34,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:00:34,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2019-10-02 17:00:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:34,467 INFO L225 Difference]: With dead ends: 346 [2019-10-02 17:00:34,467 INFO L226 Difference]: Without dead ends: 278 [2019-10-02 17:00:34,470 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:34,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-02 17:00:34,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-02 17:00:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-02 17:00:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-02 17:00:34,587 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 85 [2019-10-02 17:00:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:34,588 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-02 17:00:34,588 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:00:34,588 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-02 17:00:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-02 17:00:34,601 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:34,602 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:34,602 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:34,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2076475216, now seen corresponding path program 1 times [2019-10-02 17:00:34,603 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:34,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:34,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:34,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:34,607 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:34,755 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:34,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 17:00:34,756 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:34,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 17:00:34,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 17:00:34,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 17:00:34,759 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-02 17:00:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:35,526 INFO L93 Difference]: Finished difference Result 431 states and 612 transitions. [2019-10-02 17:00:35,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 17:00:35,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-10-02 17:00:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:35,531 INFO L225 Difference]: With dead ends: 431 [2019-10-02 17:00:35,531 INFO L226 Difference]: Without dead ends: 431 [2019-10-02 17:00:35,532 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 17:00:35,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-02 17:00:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-02 17:00:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-02 17:00:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-02 17:00:35,553 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 95 [2019-10-02 17:00:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:35,553 INFO L475 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-02 17:00:35,553 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 17:00:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-02 17:00:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-02 17:00:35,555 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:35,556 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:35,556 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:35,557 INFO L82 PathProgramCache]: Analyzing trace with hash -970621106, now seen corresponding path program 1 times [2019-10-02 17:00:35,557 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:35,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:35,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:35,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:35,559 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:35,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:35,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 17:00:35,691 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:35,693 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 17:00:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 17:00:35,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:35,694 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-10-02 17:00:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:36,263 INFO L93 Difference]: Finished difference Result 828 states and 1160 transitions. [2019-10-02 17:00:36,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 17:00:36,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-02 17:00:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:36,272 INFO L225 Difference]: With dead ends: 828 [2019-10-02 17:00:36,272 INFO L226 Difference]: Without dead ends: 828 [2019-10-02 17:00:36,272 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 17:00:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-02 17:00:36,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-10-02 17:00:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-10-02 17:00:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1160 transitions. [2019-10-02 17:00:36,310 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1160 transitions. Word has length 96 [2019-10-02 17:00:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:36,311 INFO L475 AbstractCegarLoop]: Abstraction has 828 states and 1160 transitions. [2019-10-02 17:00:36,311 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 17:00:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1160 transitions. [2019-10-02 17:00:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-02 17:00:36,314 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:36,314 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:36,314 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:36,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1409491302, now seen corresponding path program 1 times [2019-10-02 17:00:36,315 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:36,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:36,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:36,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:36,317 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:36,489 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 17:00:36,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-02 17:00:36,489 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 17:00:36,490 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 17:00:36,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 17:00:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-02 17:00:36,490 INFO L87 Difference]: Start difference. First operand 828 states and 1160 transitions. Second operand 7 states. [2019-10-02 17:00:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 17:00:37,588 INFO L93 Difference]: Finished difference Result 1301 states and 1812 transitions. [2019-10-02 17:00:37,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 17:00:37,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2019-10-02 17:00:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 17:00:37,597 INFO L225 Difference]: With dead ends: 1301 [2019-10-02 17:00:37,597 INFO L226 Difference]: Without dead ends: 1301 [2019-10-02 17:00:37,597 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-02 17:00:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2019-10-02 17:00:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1130. [2019-10-02 17:00:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1130 states. [2019-10-02 17:00:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1509 transitions. [2019-10-02 17:00:37,643 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1509 transitions. Word has length 102 [2019-10-02 17:00:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 17:00:37,644 INFO L475 AbstractCegarLoop]: Abstraction has 1130 states and 1509 transitions. [2019-10-02 17:00:37,644 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 17:00:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1509 transitions. [2019-10-02 17:00:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-02 17:00:37,647 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 17:00:37,648 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 17:00:37,648 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 17:00:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 17:00:37,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1605942605, now seen corresponding path program 1 times [2019-10-02 17:00:37,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 17:00:37,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:37,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 17:00:37,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 17:00:37,650 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 17:00:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 17:00:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 17:00:37,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 17:00:37,737 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 17:00:37,738 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 114 with the following transitions: [2019-10-02 17:00:37,740 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [17], [18], [22], [26], [30], [34], [38], [41], [42], [46], [50], [54], [58], [62], [66], [70], [74], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [162], [166], [170], [174], [178], [182], [186], [190], [194], [198], [202], [206], [210], [214], [218], [222], [226], [230], [234], [238], [242], [246], [250], [254], [258], [262], [266], [273], [281], [289], [297], [305], [313], [321], [325], [327], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-10-02 17:00:37,824 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 17:00:37,825 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)