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/Problem14_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:26:58,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:26:58,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:26:58,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 20:26:58,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 20:26:58,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 20:26:58,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 20:26:58,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 20:26:58,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 20:26:58,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 20:26:58,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 20:26:58,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 20:26:58,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 20:26:58,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 20:26:58,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 20:26:58,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 20:26:58,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 20:26:58,869 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 20:26:58,884 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:26:58,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:26:58,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:26:58,885 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:26:58,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:26:58,886 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:26:58,886 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:26:58,887 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:26:58,887 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:26:58,887 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:26:58,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:26:58,888 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:26:58,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:26:58,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:26:58,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:26:58,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:26:58,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:26:58,889 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:26:58,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:26:58,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:26:58,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:26:58,890 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:26:58,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:26:58,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:26:58,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:26:58,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:26:58,891 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:26:58,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:26:58,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:26:58,892 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:26:58,922 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:26:58,937 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:26:58,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:26:58,943 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:26:58,943 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:26:58,944 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-02 20:26:59,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd919f70b/18620481b3ae4e8081cb24b182c0d0b6/FLAGd92816b16 [2019-10-02 20:26:59,560 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:26:59,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-02 20:26:59,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd919f70b/18620481b3ae4e8081cb24b182c0d0b6/FLAGd92816b16 [2019-10-02 20:26:59,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd919f70b/18620481b3ae4e8081cb24b182c0d0b6 [2019-10-02 20:26:59,854 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:26:59,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:26:59,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:26:59,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:26:59,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:26:59,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:26:59" (1/1) ... [2019-10-02 20:26:59,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf27f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:26:59, skipping insertion in model container [2019-10-02 20:26:59,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:26:59" (1/1) ... [2019-10-02 20:26:59,878 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:26:59,963 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:27:00,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:27:00,614 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:27:00,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:27:00,762 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:27:00,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00 WrapperNode [2019-10-02 20:27:00,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:27:00,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:27:00,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:27:00,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:27:00,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00" (1/1) ... [2019-10-02 20:27:00,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00" (1/1) ... [2019-10-02 20:27:00,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00" (1/1) ... [2019-10-02 20:27:00,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00" (1/1) ... [2019-10-02 20:27:00,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00" (1/1) ... [2019-10-02 20:27:00,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00" (1/1) ... [2019-10-02 20:27:00,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00" (1/1) ... [2019-10-02 20:27:00,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:27:00,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:27:00,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:27:00,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:27:00,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00" (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 20:27:01,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:27:01,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:27:01,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:27:01,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:27:01,011 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:27:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:27:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:27:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:27:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:27:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:27:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:27:02,418 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:27:02,418 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:27:02,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:27:02 BoogieIcfgContainer [2019-10-02 20:27:02,421 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:27:02,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:27:02,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:27:02,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:27:02,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:26:59" (1/3) ... [2019-10-02 20:27:02,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c1432f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:27:02, skipping insertion in model container [2019-10-02 20:27:02,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:27:00" (2/3) ... [2019-10-02 20:27:02,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c1432f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:27:02, skipping insertion in model container [2019-10-02 20:27:02,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:27:02" (3/3) ... [2019-10-02 20:27:02,433 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label14.c [2019-10-02 20:27:02,445 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:27:02,458 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:27:02,479 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:27:02,524 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:27:02,526 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:27:02,526 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:27:02,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:27:02,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:27:02,529 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:27:02,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:27:02,529 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:27:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-02 20:27:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-02 20:27:02,577 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:27:02,578 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] [2019-10-02 20:27:02,580 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:27:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:27:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2013862189, now seen corresponding path program 1 times [2019-10-02 20:27:02,591 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:27:02,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:27:02,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:27:02,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:27:02,651 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:27:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:27:02,945 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 20:27:02,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:27:02,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:27:02,948 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:27:02,954 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:27:02,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:27:02,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:27:02,974 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-02 20:27:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:27:04,890 INFO L93 Difference]: Finished difference Result 642 states and 940 transitions. [2019-10-02 20:27:04,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:27:04,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-02 20:27:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:27:04,916 INFO L225 Difference]: With dead ends: 642 [2019-10-02 20:27:04,916 INFO L226 Difference]: Without dead ends: 554 [2019-10-02 20:27:04,918 INFO L640 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 [2019-10-02 20:27:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-02 20:27:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-02 20:27:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-02 20:27:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 806 transitions. [2019-10-02 20:27:05,019 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 806 transitions. Word has length 32 [2019-10-02 20:27:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:27:05,020 INFO L475 AbstractCegarLoop]: Abstraction has 554 states and 806 transitions. [2019-10-02 20:27:05,020 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:27:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 806 transitions. [2019-10-02 20:27:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-02 20:27:05,039 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:27:05,040 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:05,040 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:27:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:27:05,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1275083330, now seen corresponding path program 1 times [2019-10-02 20:27:05,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:27:05,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:27:05,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:27:05,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:27:05,045 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:27:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:27:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:27:05,295 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:27:05,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:27:05,296 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:27:05,300 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:27:05,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:27:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:27:05,301 INFO L87 Difference]: Start difference. First operand 554 states and 806 transitions. Second operand 4 states. [2019-10-02 20:27:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:27:06,892 INFO L93 Difference]: Finished difference Result 1646 states and 2329 transitions. [2019-10-02 20:27:06,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:27:06,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2019-10-02 20:27:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:27:06,904 INFO L225 Difference]: With dead ends: 1646 [2019-10-02 20:27:06,904 INFO L226 Difference]: Without dead ends: 1646 [2019-10-02 20:27:06,905 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:27:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-02 20:27:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-02 20:27:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-02 20:27:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2329 transitions. [2019-10-02 20:27:06,986 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2329 transitions. Word has length 144 [2019-10-02 20:27:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:27:06,987 INFO L475 AbstractCegarLoop]: Abstraction has 1646 states and 2329 transitions. [2019-10-02 20:27:06,988 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:27:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2329 transitions. [2019-10-02 20:27:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-02 20:27:06,997 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:27:06,997 INFO L411 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:27:06,998 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:27:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:27:06,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1544408570, now seen corresponding path program 1 times [2019-10-02 20:27:06,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:27:07,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:27:07,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:27:07,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:27:07,001 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:27:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:27:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 99 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:27:07,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:27:07,453 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:27:07,455 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 218 with the following transitions: [2019-10-02 20:27:07,458 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:27:07,530 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:27:07,531 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:27:17,534 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:27:17,536 INFO L272 AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Performed 273 root evaluator evaluations with a maximum evaluation depth of 13. Performed 273 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 20:27:17,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:27:17,541 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:27:24,722 INFO L227 lantSequenceWeakener]: Weakened 198 states. On average, predicates are now at 77.74% of their original sizes. [2019-10-02 20:27:24,722 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:27:24,814 INFO L420 sIntCurrentIteration]: We unified 216 AI predicates to 216 [2019-10-02 20:27:24,814 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:27:24,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:27:24,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-10-02 20:27:24,816 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:27:24,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 20:27:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 20:27:24,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-02 20:27:24,821 INFO L87 Difference]: Start difference. First operand 1646 states and 2329 transitions. Second operand 11 states. [2019-10-02 20:28:59,100 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:30:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:30:52,121 INFO L93 Difference]: Finished difference Result 1832 states and 2526 transitions. [2019-10-02 20:30:52,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-02 20:30:52,122 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 217 [2019-10-02 20:30:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:30:52,132 INFO L225 Difference]: With dead ends: 1832 [2019-10-02 20:30:52,133 INFO L226 Difference]: Without dead ends: 1832 [2019-10-02 20:30:52,133 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-02 20:30:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2019-10-02 20:30:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1828. [2019-10-02 20:30:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1828 states. [2019-10-02 20:30:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2519 transitions. [2019-10-02 20:30:52,183 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2519 transitions. Word has length 217 [2019-10-02 20:30:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:30:52,184 INFO L475 AbstractCegarLoop]: Abstraction has 1828 states and 2519 transitions. [2019-10-02 20:30:52,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 20:30:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2519 transitions. [2019-10-02 20:30:52,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-10-02 20:30:52,191 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:30:52,191 INFO L411 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:30:52,192 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:30:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:30:52,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2083335041, now seen corresponding path program 1 times [2019-10-02 20:30:52,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:30:52,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:30:52,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:30:52,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:30:52,194 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:30:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:30:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 161 proven. 140 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 20:30:52,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:30:52,930 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:30:52,931 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 302 with the following transitions: [2019-10-02 20:30:52,931 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:30:52,937 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:30:52,937 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:31:04,431 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:31:04,432 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:31:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:31:04,432 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:31:08,007 INFO L227 lantSequenceWeakener]: Weakened 298 states. On average, predicates are now at 77.5% of their original sizes. [2019-10-02 20:31:08,008 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:31:08,099 INFO L420 sIntCurrentIteration]: We unified 300 AI predicates to 300 [2019-10-02 20:31:08,099 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:31:08,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:31:08,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2019-10-02 20:31:08,100 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:31:08,101 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 20:31:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 20:31:08,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 20:31:08,102 INFO L87 Difference]: Start difference. First operand 1828 states and 2519 transitions. Second operand 11 states. [2019-10-02 20:31:39,675 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:32:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:32:07,138 INFO L93 Difference]: Finished difference Result 2044 states and 2745 transitions. [2019-10-02 20:32:07,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 20:32:07,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 301 [2019-10-02 20:32:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:32:07,149 INFO L225 Difference]: With dead ends: 2044 [2019-10-02 20:32:07,149 INFO L226 Difference]: Without dead ends: 2044 [2019-10-02 20:32:07,150 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 20:32:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2019-10-02 20:32:07,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1828. [2019-10-02 20:32:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1828 states. [2019-10-02 20:32:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2518 transitions. [2019-10-02 20:32:07,198 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2518 transitions. Word has length 301 [2019-10-02 20:32:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:32:07,199 INFO L475 AbstractCegarLoop]: Abstraction has 1828 states and 2518 transitions. [2019-10-02 20:32:07,199 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 20:32:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2518 transitions. [2019-10-02 20:32:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2019-10-02 20:32:07,206 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:32:07,207 INFO L411 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:32:07,207 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:32:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:32:07,207 INFO L82 PathProgramCache]: Analyzing trace with hash -462095149, now seen corresponding path program 1 times [2019-10-02 20:32:07,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:32:07,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:07,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:32:07,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:32:07,210 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:32:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:32:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 132 proven. 146 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-02 20:32:07,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:32:07,664 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:32:07,664 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 328 with the following transitions: [2019-10-02 20:32:07,665 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:32:07,673 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:32:07,673 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:32:21,619 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:32:21,619 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 565 root evaluator evaluations with a maximum evaluation depth of 13. Performed 565 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 20:32:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:32:21,620 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:32:31,861 INFO L227 lantSequenceWeakener]: Weakened 324 states. On average, predicates are now at 77.49% of their original sizes. [2019-10-02 20:32:31,861 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:32:31,954 INFO L420 sIntCurrentIteration]: We unified 326 AI predicates to 326 [2019-10-02 20:32:31,954 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:32:31,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:32:31,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 20:32:31,955 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:32:31,955 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 20:32:31,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 20:32:31,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-02 20:32:31,956 INFO L87 Difference]: Start difference. First operand 1828 states and 2518 transitions. Second operand 11 states. [2019-10-02 20:33:12,359 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:34:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:34:50,908 INFO L93 Difference]: Finished difference Result 2196 states and 2908 transitions. [2019-10-02 20:34:50,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 20:34:50,908 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 327 [2019-10-02 20:34:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:34:50,920 INFO L225 Difference]: With dead ends: 2196 [2019-10-02 20:34:50,920 INFO L226 Difference]: Without dead ends: 2196 [2019-10-02 20:34:50,921 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-10-02 20:34:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2019-10-02 20:34:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2194. [2019-10-02 20:34:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2194 states. [2019-10-02 20:34:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2906 transitions. [2019-10-02 20:34:50,968 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2906 transitions. Word has length 327 [2019-10-02 20:34:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:34:50,969 INFO L475 AbstractCegarLoop]: Abstraction has 2194 states and 2906 transitions. [2019-10-02 20:34:50,969 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 20:34:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2906 transitions. [2019-10-02 20:34:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-10-02 20:34:50,976 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:34:50,977 INFO L411 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:34:50,977 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:34:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:34:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1474721326, now seen corresponding path program 1 times [2019-10-02 20:34:50,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:34:50,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:34:50,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:34:50,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:34:50,979 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:34:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:34:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 211 proven. 111 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-02 20:34:51,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:34:51,401 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:34:51,401 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 355 with the following transitions: [2019-10-02 20:34:51,402 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:34:51,406 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:34:51,406 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:35:04,414 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:35:20,612 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:35:20,612 INFO L272 AbstractInterpreter]: Visited 119 different actions 464 times. Merged at 6 different actions 18 times. Never widened. Performed 862 root evaluator evaluations with a maximum evaluation depth of 22. Performed 862 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2019-10-02 20:35:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:35:20,613 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:35:29,125 INFO L227 lantSequenceWeakener]: Weakened 351 states. On average, predicates are now at 77.47% of their original sizes. [2019-10-02 20:35:29,126 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:35:29,180 INFO L420 sIntCurrentIteration]: We unified 353 AI predicates to 353 [2019-10-02 20:35:29,180 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:35:29,181 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:35:29,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2019-10-02 20:35:29,181 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:35:29,182 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:35:29,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:35:29,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:35:29,183 INFO L87 Difference]: Start difference. First operand 2194 states and 2906 transitions. Second operand 10 states. [2019-10-02 20:37:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:37:23,997 INFO L93 Difference]: Finished difference Result 2385 states and 3135 transitions. [2019-10-02 20:37:23,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-02 20:37:23,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 354 [2019-10-02 20:37:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:37:24,011 INFO L225 Difference]: With dead ends: 2385 [2019-10-02 20:37:24,012 INFO L226 Difference]: Without dead ends: 2385 [2019-10-02 20:37:24,012 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 20:37:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2019-10-02 20:37:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2380. [2019-10-02 20:37:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2380 states. [2019-10-02 20:37:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 3130 transitions. [2019-10-02 20:37:24,067 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 3130 transitions. Word has length 354 [2019-10-02 20:37:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:37:24,067 INFO L475 AbstractCegarLoop]: Abstraction has 2380 states and 3130 transitions. [2019-10-02 20:37:24,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 20:37:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 3130 transitions. [2019-10-02 20:37:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2019-10-02 20:37:24,079 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:37:24,079 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 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] [2019-10-02 20:37:24,079 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:37:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:37:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1509157772, now seen corresponding path program 1 times [2019-10-02 20:37:24,080 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:37:24,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:37:24,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:37:24,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:37:24,082 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:37:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:37:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 190 proven. 181 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-02 20:37:24,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:37:24,333 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:37:24,334 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 412 with the following transitions: [2019-10-02 20:37:24,334 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:37:24,337 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:37:24,337 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:37:38,372 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:37:38,373 INFO L272 AbstractInterpreter]: Visited 122 different actions 363 times. Merged at 6 different actions 17 times. Never widened. Performed 661 root evaluator evaluations with a maximum evaluation depth of 13. Performed 661 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2019-10-02 20:37:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:37:38,373 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:37:43,102 INFO L227 lantSequenceWeakener]: Weakened 408 states. On average, predicates are now at 77.45% of their original sizes. [2019-10-02 20:37:43,102 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:37:43,184 INFO L420 sIntCurrentIteration]: We unified 410 AI predicates to 410 [2019-10-02 20:37:43,184 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:37:43,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:37:43,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 20:37:43,185 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:37:43,186 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:37:43,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:37:43,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:37:43,186 INFO L87 Difference]: Start difference. First operand 2380 states and 3130 transitions. Second operand 10 states. [2019-10-02 20:38:17,931 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:38:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:38:50,988 INFO L93 Difference]: Finished difference Result 2755 states and 3533 transitions. [2019-10-02 20:38:50,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 20:38:50,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 411 [2019-10-02 20:38:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:38:51,000 INFO L225 Difference]: With dead ends: 2755 [2019-10-02 20:38:51,000 INFO L226 Difference]: Without dead ends: 2755 [2019-10-02 20:38:51,001 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 20:38:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2019-10-02 20:38:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2568. [2019-10-02 20:38:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2019-10-02 20:38:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3331 transitions. [2019-10-02 20:38:51,060 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3331 transitions. Word has length 411 [2019-10-02 20:38:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:38:51,060 INFO L475 AbstractCegarLoop]: Abstraction has 2568 states and 3331 transitions. [2019-10-02 20:38:51,061 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 20:38:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3331 transitions. [2019-10-02 20:38:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2019-10-02 20:38:51,066 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:38:51,067 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 20:38:51,067 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:38:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:38:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1251181067, now seen corresponding path program 1 times [2019-10-02 20:38:51,068 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:38:51,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:38:51,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:38:51,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:38:51,069 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:38:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:38:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 394 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-02 20:38:51,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:38:51,402 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:38:51,403 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 439 with the following transitions: [2019-10-02 20:38:51,403 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [961], [965], [967], [972], [973], [974], [976], [977] [2019-10-02 20:38:51,406 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:38:51,406 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:39:04,971 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:39:19,405 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:39:19,406 INFO L272 AbstractInterpreter]: Visited 120 different actions 599 times. Merged at 7 different actions 39 times. Never widened. Performed 993 root evaluator evaluations with a maximum evaluation depth of 22. Performed 993 inverse root evaluator evaluations with a maximum inverse evaluation depth of 22. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2019-10-02 20:39:19,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:39:19,407 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:39:28,049 INFO L227 lantSequenceWeakener]: Weakened 435 states. On average, predicates are now at 77.45% of their original sizes. [2019-10-02 20:39:28,049 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:39:28,118 INFO L420 sIntCurrentIteration]: We unified 437 AI predicates to 437 [2019-10-02 20:39:28,119 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:39:28,119 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:39:28,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 20:39:28,120 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:39:28,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 20:39:28,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 20:39:28,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 20:39:28,121 INFO L87 Difference]: Start difference. First operand 2568 states and 3331 transitions. Second operand 10 states.