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/Problem18_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:55:42,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:55:42,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:55:42,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 21:55:42,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:55:42,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:55:42,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:55:42,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:55:42,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:55:42,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:55:42,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:55:42,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:55:42,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:55:42,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:55:42,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:55:42,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:55:42,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:55:42,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 21:55:42,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 21:55:42,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 21:55:42,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 21:55:42,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 21:55:42,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 21:55:42,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 21:55:42,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 21:55:42,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 21:55:42,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 21:55:42,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 21:55:42,864 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 21:55:42,881 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:55:42,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:55:42,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:55:42,882 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:55:42,883 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:55:42,883 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:55:42,885 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:55:42,885 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:55:42,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:55:42,885 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:55:42,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:55:42,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:55:42,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:55:42,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:55:42,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:55:42,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:55:42,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:55:42,887 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:55:42,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:55:42,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:55:42,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:55:42,888 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:55:42,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:55:42,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:55:42,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:55:42,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:55:42,890 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:55:42,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:55:42,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:55:42,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:55:42,938 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:55:42,948 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:55:42,952 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:55:42,953 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:55:42,954 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:55:42,954 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label16.c [2019-10-02 21:55:43,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400af8795/97a655be47d34c439be1bff3dd399b22/FLAG5c971c2af [2019-10-02 21:55:43,702 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:55:43,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label16.c [2019-10-02 21:55:43,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400af8795/97a655be47d34c439be1bff3dd399b22/FLAG5c971c2af [2019-10-02 21:55:43,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400af8795/97a655be47d34c439be1bff3dd399b22 [2019-10-02 21:55:43,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:55:43,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:55:43,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:55:43,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:55:43,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:55:43,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:55:43" (1/1) ... [2019-10-02 21:55:43,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e20ad7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:43, skipping insertion in model container [2019-10-02 21:55:43,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:55:43" (1/1) ... [2019-10-02 21:55:43,801 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:55:43,939 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:55:45,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:55:45,318 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:55:45,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:55:45,834 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:55:45,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45 WrapperNode [2019-10-02 21:55:45,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:55:45,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:55:45,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:55:45,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:55:45,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45" (1/1) ... [2019-10-02 21:55:45,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45" (1/1) ... [2019-10-02 21:55:45,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45" (1/1) ... [2019-10-02 21:55:45,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45" (1/1) ... [2019-10-02 21:55:46,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45" (1/1) ... [2019-10-02 21:55:46,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45" (1/1) ... [2019-10-02 21:55:46,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45" (1/1) ... [2019-10-02 21:55:46,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:55:46,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:55:46,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:55:46,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:55:46,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45" (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 21:55:46,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:55:46,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:55:46,171 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:55:46,171 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:55:46,172 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 21:55:46,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:55:46,172 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:55:46,172 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:55:46,173 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 21:55:46,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:55:46,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:55:46,174 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:55:46,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:55:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:55:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:55:49,981 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:55:49,982 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:55:49,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:55:49 BoogieIcfgContainer [2019-10-02 21:55:49,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:55:49,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:55:49,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:55:49,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:55:49,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:55:43" (1/3) ... [2019-10-02 21:55:49,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55014527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:55:49, skipping insertion in model container [2019-10-02 21:55:49,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:55:45" (2/3) ... [2019-10-02 21:55:49,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55014527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:55:49, skipping insertion in model container [2019-10-02 21:55:49,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:55:49" (3/3) ... [2019-10-02 21:55:49,996 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label16.c [2019-10-02 21:55:50,008 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:55:50,018 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:55:50,034 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:55:50,065 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:55:50,065 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:55:50,066 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:55:50,066 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:55:50,066 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:55:50,066 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:55:50,067 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:55:50,067 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:55:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-02 21:55:50,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-02 21:55:50,126 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:55:50,127 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:55:50,130 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:55:50,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:55:50,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1134727921, now seen corresponding path program 1 times [2019-10-02 21:55:50,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:55:50,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:55:50,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:55:50,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:55:50,200 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:55:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:55:50,539 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 21:55:50,541 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:55:50,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 21:55:50,542 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:55:50,547 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 21:55:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 21:55:50,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:55:50,564 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-02 21:55:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:55:55,244 INFO L93 Difference]: Finished difference Result 1480 states and 2747 transitions. [2019-10-02 21:55:55,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 21:55:55,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-10-02 21:55:55,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:55:55,288 INFO L225 Difference]: With dead ends: 1480 [2019-10-02 21:55:55,289 INFO L226 Difference]: Without dead ends: 1412 [2019-10-02 21:55:55,290 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:55:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-02 21:55:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-02 21:55:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-02 21:55:55,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-02 21:55:55,430 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 52 [2019-10-02 21:55:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:55:55,431 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-02 21:55:55,432 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 21:55:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-02 21:55:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-02 21:55:55,447 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:55:55,447 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, 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] [2019-10-02 21:55:55,448 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:55:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:55:55,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1821965093, now seen corresponding path program 1 times [2019-10-02 21:55:55,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:55:55,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:55:55,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:55:55,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:55:55,451 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:55:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:55:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:55:55,721 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:55:55,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:55:55,722 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:55:55,724 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:55:55,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:55:55,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:55:55,725 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-02 21:56:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:56:01,254 INFO L93 Difference]: Finished difference Result 2888 states and 5181 transitions. [2019-10-02 21:56:01,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:56:01,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-02 21:56:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:56:01,278 INFO L225 Difference]: With dead ends: 2888 [2019-10-02 21:56:01,279 INFO L226 Difference]: Without dead ends: 2888 [2019-10-02 21:56:01,280 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 21:56:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-02 21:56:01,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-02 21:56:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-02 21:56:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 5127 transitions. [2019-10-02 21:56:01,386 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 5127 transitions. Word has length 125 [2019-10-02 21:56:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:56:01,386 INFO L475 AbstractCegarLoop]: Abstraction has 2864 states and 5127 transitions. [2019-10-02 21:56:01,386 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:56:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 5127 transitions. [2019-10-02 21:56:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-02 21:56:01,389 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:56:01,389 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, 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] [2019-10-02 21:56:01,390 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:56:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:56:01,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1074622240, now seen corresponding path program 1 times [2019-10-02 21:56:01,390 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:56:01,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:56:01,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:56:01,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:56:01,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:56:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:56:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:56:01,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:56:01,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 21:56:01,528 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:56:01,530 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 21:56:01,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 21:56:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-02 21:56:01,531 INFO L87 Difference]: Start difference. First operand 2864 states and 5127 transitions. Second operand 5 states. [2019-10-02 21:56:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:56:07,370 INFO L93 Difference]: Finished difference Result 5190 states and 8230 transitions. [2019-10-02 21:56:07,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 21:56:07,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2019-10-02 21:56:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:56:07,396 INFO L225 Difference]: With dead ends: 5190 [2019-10-02 21:56:07,396 INFO L226 Difference]: Without dead ends: 5190 [2019-10-02 21:56:07,396 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 21:56:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2019-10-02 21:56:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 5092. [2019-10-02 21:56:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5092 states. [2019-10-02 21:56:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 8027 transitions. [2019-10-02 21:56:07,540 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 8027 transitions. Word has length 128 [2019-10-02 21:56:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:56:07,542 INFO L475 AbstractCegarLoop]: Abstraction has 5092 states and 8027 transitions. [2019-10-02 21:56:07,542 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 21:56:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 8027 transitions. [2019-10-02 21:56:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-02 21:56:07,546 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:56:07,546 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, 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] [2019-10-02 21:56:07,546 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:56:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:56:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash -454172028, now seen corresponding path program 1 times [2019-10-02 21:56:07,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:56:07,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:56:07,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:56:07,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:56:07,550 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:56:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:56:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:56:07,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:56:07,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 21:56:07,718 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:56:07,719 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 21:56:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 21:56:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 21:56:07,719 INFO L87 Difference]: Start difference. First operand 5092 states and 8027 transitions. Second operand 4 states. [2019-10-02 21:56:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:56:13,822 INFO L93 Difference]: Finished difference Result 10788 states and 15447 transitions. [2019-10-02 21:56:13,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 21:56:13,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-10-02 21:56:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:56:13,874 INFO L225 Difference]: With dead ends: 10788 [2019-10-02 21:56:13,875 INFO L226 Difference]: Without dead ends: 10788 [2019-10-02 21:56:13,875 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 21:56:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2019-10-02 21:56:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 10788. [2019-10-02 21:56:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10788 states. [2019-10-02 21:56:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10788 states to 10788 states and 15447 transitions. [2019-10-02 21:56:14,159 INFO L78 Accepts]: Start accepts. Automaton has 10788 states and 15447 transitions. Word has length 158 [2019-10-02 21:56:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:56:14,160 INFO L475 AbstractCegarLoop]: Abstraction has 10788 states and 15447 transitions. [2019-10-02 21:56:14,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 21:56:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 10788 states and 15447 transitions. [2019-10-02 21:56:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-02 21:56:14,166 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:56:14,167 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:14,167 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:56:14,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:56:14,168 INFO L82 PathProgramCache]: Analyzing trace with hash 628188816, now seen corresponding path program 1 times [2019-10-02 21:56:14,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:56:14,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:56:14,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:56:14,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:56:14,170 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:56:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:56:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:56:14,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:56:14,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:56:14,490 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:56:14,491 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:56:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:56:14,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:56:14,492 INFO L87 Difference]: Start difference. First operand 10788 states and 15447 transitions. Second operand 6 states. [2019-10-02 21:56:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:56:20,733 INFO L93 Difference]: Finished difference Result 21142 states and 30941 transitions. [2019-10-02 21:56:20,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:56:20,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 232 [2019-10-02 21:56:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:56:20,826 INFO L225 Difference]: With dead ends: 21142 [2019-10-02 21:56:20,827 INFO L226 Difference]: Without dead ends: 21142 [2019-10-02 21:56:20,828 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 21:56:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21142 states. [2019-10-02 21:56:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21142 to 20340. [2019-10-02 21:56:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20340 states. [2019-10-02 21:56:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20340 states to 20340 states and 29339 transitions. [2019-10-02 21:56:21,382 INFO L78 Accepts]: Start accepts. Automaton has 20340 states and 29339 transitions. Word has length 232 [2019-10-02 21:56:21,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:56:21,383 INFO L475 AbstractCegarLoop]: Abstraction has 20340 states and 29339 transitions. [2019-10-02 21:56:21,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:56:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 20340 states and 29339 transitions. [2019-10-02 21:56:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2019-10-02 21:56:21,394 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:56:21,394 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-02 21:56:21,395 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:56:21,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:56:21,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1244352024, now seen corresponding path program 1 times [2019-10-02 21:56:21,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:56:21,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:56:21,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:56:21,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:56:21,400 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:56:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:56:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 90 proven. 118 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 21:56:21,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:56:21,728 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:56:21,729 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 312 with the following transitions: [2019-10-02 21:56:21,732 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1895], [1903], [1911], [1919], [1927], [1935], [1943], [1947], [1949], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2328], [2329], [2333], [2337], [2341], [2345], [2349], [2353], [2357], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2388], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-10-02 21:56:21,823 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:56:21,824 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:56:31,907 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:56:31,910 INFO L272 AbstractInterpreter]: Visited 142 different actions 142 times. Never merged. Never widened. Performed 323 root evaluator evaluations with a maximum evaluation depth of 13. Performed 323 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 21:56:31,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:56:31,914 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:56:42,741 INFO L227 lantSequenceWeakener]: Weakened 292 states. On average, predicates are now at 77.9% of their original sizes. [2019-10-02 21:56:42,742 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:56:42,819 INFO L420 sIntCurrentIteration]: We unified 310 AI predicates to 310 [2019-10-02 21:56:42,819 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:56:42,820 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:56:42,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 21:56:42,821 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:56:42,821 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 21:56:42,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 21:56:42,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 21:56:42,822 INFO L87 Difference]: Start difference. First operand 20340 states and 29339 transitions. Second operand 10 states. [2019-10-02 21:58:32,452 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.