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/Problem15_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 18:55:10,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 18:55:10,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 18:55:10,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 18:55:10,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 18:55:10,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 18:55:10,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 18:55:10,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 18:55:10,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 18:55:10,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 18:55:10,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 18:55:10,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 18:55:10,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 18:55:10,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 18:55:10,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 18:55:10,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 18:55:10,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 18:55:10,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 18:55:10,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 18:55:10,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 18:55:10,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 18:55:10,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 18:55:10,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 18:55:10,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 18:55:10,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 18:55:10,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 18:55:10,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 18:55:10,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 18:55:10,806 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 [2019-09-09 18:55:10,832 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 18:55:10,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 18:55:10,832 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 18:55:10,833 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 18:55:10,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 18:55:10,833 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 18:55:10,834 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 18:55:10,834 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 18:55:10,834 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 18:55:10,834 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 18:55:10,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 18:55:10,835 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 18:55:10,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 18:55:10,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 18:55:10,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 18:55:10,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 18:55:10,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 18:55:10,836 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 18:55:10,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 18:55:10,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 18:55:10,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 18:55:10,837 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 18:55:10,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 18:55:10,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 18:55:10,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 18:55:10,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 18:55:10,838 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 18:55:10,838 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 18:55:10,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 18:55:10,839 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 18:55:10,871 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 18:55:10,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 18:55:10,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 18:55:10,890 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 18:55:10,890 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 18:55:10,891 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label09.c [2019-09-09 18:55:10,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89dac9e72/91d7eff583294a66a4840083c5744755/FLAGd97c629e9 [2019-09-09 18:55:11,658 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 18:55:11,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label09.c [2019-09-09 18:55:11,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89dac9e72/91d7eff583294a66a4840083c5744755/FLAGd97c629e9 [2019-09-09 18:55:11,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89dac9e72/91d7eff583294a66a4840083c5744755 [2019-09-09 18:55:11,780 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 18:55:11,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 18:55:11,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 18:55:11,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 18:55:11,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 18:55:11,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:55:11" (1/1) ... [2019-09-09 18:55:11,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a0e0637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:11, skipping insertion in model container [2019-09-09 18:55:11,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:55:11" (1/1) ... [2019-09-09 18:55:11,799 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 18:55:11,876 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 18:55:12,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:55:12,689 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 18:55:13,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 18:55:13,134 INFO L192 MainTranslator]: Completed translation [2019-09-09 18:55:13,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13 WrapperNode [2019-09-09 18:55:13,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 18:55:13,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 18:55:13,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 18:55:13,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 18:55:13,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13" (1/1) ... [2019-09-09 18:55:13,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13" (1/1) ... [2019-09-09 18:55:13,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13" (1/1) ... [2019-09-09 18:55:13,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13" (1/1) ... [2019-09-09 18:55:13,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13" (1/1) ... [2019-09-09 18:55:13,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13" (1/1) ... [2019-09-09 18:55:13,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13" (1/1) ... [2019-09-09 18:55:13,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 18:55:13,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 18:55:13,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 18:55:13,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 18:55:13,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13" (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 [2019-09-09 18:55:13,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 18:55:13,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 18:55:13,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 18:55:13,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 18:55:13,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 18:55:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 18:55:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 18:55:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 18:55:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 18:55:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 18:55:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 18:55:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 18:55:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 18:55:16,347 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 18:55:16,347 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 18:55:16,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:55:16 BoogieIcfgContainer [2019-09-09 18:55:16,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 18:55:16,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 18:55:16,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 18:55:16,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 18:55:16,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:55:11" (1/3) ... [2019-09-09 18:55:16,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a979f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:55:16, skipping insertion in model container [2019-09-09 18:55:16,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:55:13" (2/3) ... [2019-09-09 18:55:16,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a979f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:55:16, skipping insertion in model container [2019-09-09 18:55:16,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:55:16" (3/3) ... [2019-09-09 18:55:16,357 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label09.c [2019-09-09 18:55:16,368 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 18:55:16,376 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 18:55:16,394 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 18:55:16,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 18:55:16,423 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 18:55:16,423 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 18:55:16,423 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 18:55:16,423 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 18:55:16,423 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 18:55:16,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 18:55:16,424 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 18:55:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 18:55:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-09 18:55:16,461 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:55:16,462 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:55:16,464 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:55:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:16,470 INFO L82 PathProgramCache]: Analyzing trace with hash 399541885, now seen corresponding path program 1 times [2019-09-09 18:55:16,472 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:55:16,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:16,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:55:16,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:16,524 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:55:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:55:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:55:16,708 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:55:16,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 18:55:16,709 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:55:16,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 18:55:16,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 18:55:16,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:55:16,732 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-09-09 18:55:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:55:22,745 INFO L93 Difference]: Finished difference Result 1079 states and 1627 transitions. [2019-09-09 18:55:22,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 18:55:22,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-09-09 18:55:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:55:22,777 INFO L225 Difference]: With dead ends: 1079 [2019-09-09 18:55:22,777 INFO L226 Difference]: Without dead ends: 1006 [2019-09-09 18:55:22,779 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 18:55:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2019-09-09 18:55:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1004. [2019-09-09 18:55:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2019-09-09 18:55:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1509 transitions. [2019-09-09 18:55:22,884 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1509 transitions. Word has length 13 [2019-09-09 18:55:22,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:55:22,884 INFO L475 AbstractCegarLoop]: Abstraction has 1004 states and 1509 transitions. [2019-09-09 18:55:22,884 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 18:55:22,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1509 transitions. [2019-09-09 18:55:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-09 18:55:22,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:55:22,889 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 18:55:22,889 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:55:22,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:22,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2086473158, now seen corresponding path program 1 times [2019-09-09 18:55:22,890 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:55:22,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:22,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:55:22,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:22,891 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:55:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:55:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 18:55:23,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 18:55:23,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 18:55:23,073 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:55:23,078 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 18:55:23,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 18:55:23,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:55:23,079 INFO L87 Difference]: Start difference. First operand 1004 states and 1509 transitions. Second operand 3 states. [2019-09-09 18:55:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 18:55:26,324 INFO L93 Difference]: Finished difference Result 1930 states and 2559 transitions. [2019-09-09 18:55:26,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 18:55:26,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2019-09-09 18:55:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 18:55:26,337 INFO L225 Difference]: With dead ends: 1930 [2019-09-09 18:55:26,337 INFO L226 Difference]: Without dead ends: 1930 [2019-09-09 18:55:26,338 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 18:55:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2019-09-09 18:55:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2019-09-09 18:55:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2019-09-09 18:55:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2555 transitions. [2019-09-09 18:55:26,413 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2555 transitions. Word has length 82 [2019-09-09 18:55:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 18:55:26,414 INFO L475 AbstractCegarLoop]: Abstraction has 1928 states and 2555 transitions. [2019-09-09 18:55:26,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 18:55:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2555 transitions. [2019-09-09 18:55:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-09 18:55:26,429 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 18:55:26,429 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 18:55:26,429 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 18:55:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:26,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1110443806, now seen corresponding path program 1 times [2019-09-09 18:55:26,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 18:55:26,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:26,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 18:55:26,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 18:55:26,432 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 18:55:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 18:55:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 13 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-09 18:55:26,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 18:55:26,793 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 18:55:26,794 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 192 with the following transitions: [2019-09-09 18:55:26,798 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [629], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 18:55:26,850 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 18:55:26,850 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 18:55:29,473 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 18:55:30,386 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 18:55:30,389 INFO L272 AbstractInterpreter]: Visited 103 different actions 201 times. Merged at 4 different actions 5 times. Never widened. Performed 453 root evaluator evaluations with a maximum evaluation depth of 13. Performed 453 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 18:55:30,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 18:55:30,394 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 18:55:31,473 INFO L227 lantSequenceWeakener]: Weakened 188 states. On average, predicates are now at 77.15% of their original sizes. [2019-09-09 18:55:31,474 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 18:55:31,552 INFO L420 sIntCurrentIteration]: We unified 190 AI predicates to 190 [2019-09-09 18:55:31,553 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 18:55:31,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 18:55:31,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 18:55:31,554 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 18:55:31,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 18:55:31,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 18:55:31,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 18:55:31,559 INFO L87 Difference]: Start difference. First operand 1928 states and 2555 transitions. Second operand 11 states.