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/Problem11_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:43:15,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:43:15,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:43:15,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:43:15,644 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 19:43:15,660 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:43:15,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:43:15,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:43:15,661 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:43:15,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:43:15,661 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:43:15,662 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:43:15,662 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:43:15,662 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:43:15,662 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:43:15,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:43:15,663 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:43:15,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:43:15,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:43:15,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:43:15,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:43:15,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:43:15,664 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:43:15,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:43:15,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:43:15,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:43:15,665 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:43:15,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:43:15,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:43:15,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:43:15,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:43:15,666 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:43:15,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:43:15,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:43:15,667 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:43:15,695 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:43:15,708 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:43:15,711 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:43:15,713 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:43:15,713 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:43:15,714 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-10-02 19:43:15,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caad8cea0/9e181c373e3749ae8771211cfcd67d8d/FLAGd63df5ef7 [2019-10-02 19:43:16,352 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:43:16,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-10-02 19:43:16,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caad8cea0/9e181c373e3749ae8771211cfcd67d8d/FLAGd63df5ef7 [2019-10-02 19:43:16,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caad8cea0/9e181c373e3749ae8771211cfcd67d8d [2019-10-02 19:43:16,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:43:16,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:43:16,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:43:16,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:43:16,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:43:16,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:43:16" (1/1) ... [2019-10-02 19:43:16,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6a066a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:16, skipping insertion in model container [2019-10-02 19:43:16,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:43:16" (1/1) ... [2019-10-02 19:43:16,649 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:43:16,725 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:43:17,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:43:17,422 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:43:17,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:43:17,661 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:43:17,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17 WrapperNode [2019-10-02 19:43:17,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:43:17,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:43:17,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:43:17,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:43:17,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17" (1/1) ... [2019-10-02 19:43:17,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17" (1/1) ... [2019-10-02 19:43:17,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17" (1/1) ... [2019-10-02 19:43:17,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17" (1/1) ... [2019-10-02 19:43:17,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17" (1/1) ... [2019-10-02 19:43:17,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17" (1/1) ... [2019-10-02 19:43:17,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17" (1/1) ... [2019-10-02 19:43:17,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:43:17,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:43:17,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:43:17,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:43:17,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17" (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 19:43:17,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:43:17,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:43:17,913 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:43:17,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:43:17,913 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:43:17,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:43:17,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:43:17,914 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:43:17,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:43:17,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:43:17,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:43:19,888 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:43:19,888 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:43:19,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:43:19 BoogieIcfgContainer [2019-10-02 19:43:19,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:43:19,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:43:19,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:43:19,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:43:19,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:43:16" (1/3) ... [2019-10-02 19:43:19,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef893ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:43:19, skipping insertion in model container [2019-10-02 19:43:19,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:43:17" (2/3) ... [2019-10-02 19:43:19,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef893ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:43:19, skipping insertion in model container [2019-10-02 19:43:19,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:43:19" (3/3) ... [2019-10-02 19:43:19,901 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label30.c [2019-10-02 19:43:19,909 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:43:19,917 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:43:19,934 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:43:19,958 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:43:19,959 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:43:19,959 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:43:19,959 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:43:19,959 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:43:19,959 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:43:19,960 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:43:19,960 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:43:19,986 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:43:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-02 19:43:19,997 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:43:19,998 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] [2019-10-02 19:43:20,000 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:43:20,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:43:20,006 INFO L82 PathProgramCache]: Analyzing trace with hash 506629546, now seen corresponding path program 1 times [2019-10-02 19:43:20,009 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:43:20,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:20,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:43:20,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:20,090 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:43:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:43:20,383 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 19:43:20,385 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:43:20,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:43:20,386 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:43:20,393 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:43:20,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:43:20,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:43:20,412 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-02 19:43:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:43:22,874 INFO L93 Difference]: Finished difference Result 711 states and 1021 transitions. [2019-10-02 19:43:22,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:43:22,876 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-10-02 19:43:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:43:22,904 INFO L225 Difference]: With dead ends: 711 [2019-10-02 19:43:22,904 INFO L226 Difference]: Without dead ends: 623 [2019-10-02 19:43:22,906 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 19:43:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-02 19:43:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2019-10-02 19:43:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-02 19:43:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 896 transitions. [2019-10-02 19:43:23,040 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 896 transitions. Word has length 35 [2019-10-02 19:43:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:43:23,041 INFO L475 AbstractCegarLoop]: Abstraction has 620 states and 896 transitions. [2019-10-02 19:43:23,042 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:43:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 896 transitions. [2019-10-02 19:43:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-02 19:43:23,052 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:43:23,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:43:23,054 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:43:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:43:23,057 INFO L82 PathProgramCache]: Analyzing trace with hash -295507094, now seen corresponding path program 1 times [2019-10-02 19:43:23,057 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:43:23,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:23,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:43:23,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:23,060 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:43:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:43:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:43:23,434 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:43:23,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:43:23,434 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:43:23,439 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:43:23,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:43:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:43:23,440 INFO L87 Difference]: Start difference. First operand 620 states and 896 transitions. Second operand 6 states. [2019-10-02 19:43:25,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:43:25,119 INFO L93 Difference]: Finished difference Result 1219 states and 1787 transitions. [2019-10-02 19:43:25,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:43:25,121 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-10-02 19:43:25,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:43:25,132 INFO L225 Difference]: With dead ends: 1219 [2019-10-02 19:43:25,132 INFO L226 Difference]: Without dead ends: 1219 [2019-10-02 19:43:25,133 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 19:43:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2019-10-02 19:43:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1200. [2019-10-02 19:43:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-10-02 19:43:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1735 transitions. [2019-10-02 19:43:25,197 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1735 transitions. Word has length 107 [2019-10-02 19:43:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:43:25,199 INFO L475 AbstractCegarLoop]: Abstraction has 1200 states and 1735 transitions. [2019-10-02 19:43:25,199 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:43:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1735 transitions. [2019-10-02 19:43:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-02 19:43:25,209 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:43:25,210 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:43:25,210 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:43:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:43:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash 388493337, now seen corresponding path program 1 times [2019-10-02 19:43:25,211 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:43:25,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:25,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:43:25,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:25,215 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:43:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:43:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:43:25,378 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:43:25,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:43:25,378 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:43:25,379 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:43:25,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:43:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:43:25,380 INFO L87 Difference]: Start difference. First operand 1200 states and 1735 transitions. Second operand 4 states. [2019-10-02 19:43:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:43:27,089 INFO L93 Difference]: Finished difference Result 2358 states and 3344 transitions. [2019-10-02 19:43:27,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:43:27,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-10-02 19:43:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:43:27,103 INFO L225 Difference]: With dead ends: 2358 [2019-10-02 19:43:27,103 INFO L226 Difference]: Without dead ends: 2358 [2019-10-02 19:43:27,104 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 19:43:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2019-10-02 19:43:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2153. [2019-10-02 19:43:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2153 states. [2019-10-02 19:43:27,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3070 transitions. [2019-10-02 19:43:27,174 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3070 transitions. Word has length 108 [2019-10-02 19:43:27,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:43:27,175 INFO L475 AbstractCegarLoop]: Abstraction has 2153 states and 3070 transitions. [2019-10-02 19:43:27,175 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:43:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3070 transitions. [2019-10-02 19:43:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-02 19:43:27,178 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:43:27,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:43:27,178 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:43:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:43:27,179 INFO L82 PathProgramCache]: Analyzing trace with hash 204212222, now seen corresponding path program 1 times [2019-10-02 19:43:27,179 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:43:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:27,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:43:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:27,181 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:43:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:43:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:43:27,373 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:43:27,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:43:27,373 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:43:27,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:43:27,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:43:27,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:43:27,376 INFO L87 Difference]: Start difference. First operand 2153 states and 3070 transitions. Second operand 6 states. [2019-10-02 19:43:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:43:30,262 INFO L93 Difference]: Finished difference Result 5880 states and 9696 transitions. [2019-10-02 19:43:30,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-02 19:43:30,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-10-02 19:43:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:43:30,357 INFO L225 Difference]: With dead ends: 5880 [2019-10-02 19:43:30,358 INFO L226 Difference]: Without dead ends: 5880 [2019-10-02 19:43:30,359 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:43:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2019-10-02 19:43:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 5142. [2019-10-02 19:43:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5142 states. [2019-10-02 19:43:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 7403 transitions. [2019-10-02 19:43:30,673 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 7403 transitions. Word has length 133 [2019-10-02 19:43:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:43:30,675 INFO L475 AbstractCegarLoop]: Abstraction has 5142 states and 7403 transitions. [2019-10-02 19:43:30,675 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:43:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 7403 transitions. [2019-10-02 19:43:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-02 19:43:30,680 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:43:30,681 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, 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] [2019-10-02 19:43:30,681 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:43:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:43:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1527930193, now seen corresponding path program 1 times [2019-10-02 19:43:30,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:43:30,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:30,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:43:30,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:43:30,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:43:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:43:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:43:30,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:43:30,907 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:43:30,908 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 181 with the following transitions: [2019-10-02 19:43:30,910 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], [169], [177], [185], [189], [191], [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], [502], [503], [507], [511], [514], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:43:30,975 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:43:30,975 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:43:58,549 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:43:58,552 INFO L272 AbstractInterpreter]: Visited 79 different actions 79 times. Never merged. Never widened. Performed 207 root evaluator evaluations with a maximum evaluation depth of 16. Performed 207 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-10-02 19:43:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:43:58,557 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:44:42,115 INFO L227 lantSequenceWeakener]: Weakened 161 states. On average, predicates are now at 73.63% of their original sizes. [2019-10-02 19:44:42,115 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:44:42,199 INFO L420 sIntCurrentIteration]: We unified 179 AI predicates to 179 [2019-10-02 19:44:42,200 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:44:42,201 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:44:42,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 19:44:42,201 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:44:42,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:44:42,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:44:42,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:44:42,203 INFO L87 Difference]: Start difference. First operand 5142 states and 7403 transitions. Second operand 10 states. [2019-10-02 19:57:37,945 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.