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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:51:20,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:51:20,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:51:20,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:51:20,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:51:20,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:51:20,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:51:20,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:51:20,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:51:20,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:51:20,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:51:20,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:51:20,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:51:20,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:51:20,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:51:20,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:51:20,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:51:20,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:51:20,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:51:20,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:51:20,845 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:51:20,859 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:51:20,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:51:20,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:51:20,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:51:20,861 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:51:20,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:51:20,862 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:51:20,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:51:20,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:51:20,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:51:20,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:51:20,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:51:20,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:51:20,863 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:51:20,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:51:20,864 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:51:20,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:51:20,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:51:20,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:51:20,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:51:20,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:51:20,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:51:20,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:51:20,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:51:20,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:51:20,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:51:20,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:51:20,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:51:20,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:51:21,195 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:51:21,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:51:21,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:51:21,221 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:51:21,222 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:51:21,222 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label45.c [2019-10-15 01:51:21,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8c96087/9c7464d515d542fdbdfe47c3e6ce7c46/FLAG2a0b39c0f [2019-10-15 01:51:22,008 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:51:22,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label45.c [2019-10-15 01:51:22,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8c96087/9c7464d515d542fdbdfe47c3e6ce7c46/FLAG2a0b39c0f [2019-10-15 01:51:22,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8c96087/9c7464d515d542fdbdfe47c3e6ce7c46 [2019-10-15 01:51:22,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:51:22,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:51:22,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:22,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:51:22,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:51:22,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2b4d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22, skipping insertion in model container [2019-10-15 01:51:22,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,186 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:51:22,331 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:51:23,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:23,762 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:51:24,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:24,435 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:51:24,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24 WrapperNode [2019-10-15 01:51:24,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:24,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:51:24,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:51:24,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:51:24,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:51:24,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:51:24,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:51:24,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:51:24,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (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 [2019-10-15 01:51:24,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:51:24,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:51:24,806 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:51:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:51:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 01:51:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 01:51:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:51:24,807 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:51:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:51:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 01:51:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 01:51:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:51:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:51:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:51:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:51:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:51:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:51:31,463 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:51:31,467 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:51:31,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:31 BoogieIcfgContainer [2019-10-15 01:51:31,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:51:31,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:51:31,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:51:31,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:51:31,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:51:22" (1/3) ... [2019-10-15 01:51:31,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6709590a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:31, skipping insertion in model container [2019-10-15 01:51:31,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (2/3) ... [2019-10-15 01:51:31,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6709590a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:31, skipping insertion in model container [2019-10-15 01:51:31,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:31" (3/3) ... [2019-10-15 01:51:31,482 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label45.c [2019-10-15 01:51:31,493 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:51:31,506 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:51:31,517 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:51:31,560 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:51:31,560 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:51:31,560 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:51:31,560 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:51:31,561 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:51:31,561 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:51:31,561 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:51:31,561 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:51:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-15 01:51:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:51:31,614 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:31,615 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:31,619 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash -874907058, now seen corresponding path program 1 times [2019-10-15 01:51:31,631 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:31,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495871139] [2019-10-15 01:51:31,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:31,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:31,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:31,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495871139] [2019-10-15 01:51:31,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:31,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:51:31,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635699263] [2019-10-15 01:51:31,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:51:31,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:31,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:51:31,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:51:31,907 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 3 states. [2019-10-15 01:51:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:36,626 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2019-10-15 01:51:36,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:51:36,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:51:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:36,660 INFO L225 Difference]: With dead ends: 2068 [2019-10-15 01:51:36,660 INFO L226 Difference]: Without dead ends: 1371 [2019-10-15 01:51:36,669 INFO L600 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 [2019-10-15 01:51:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2019-10-15 01:51:36,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2019-10-15 01:51:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2019-10-15 01:51:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2477 transitions. [2019-10-15 01:51:36,803 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2477 transitions. Word has length 11 [2019-10-15 01:51:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:36,804 INFO L462 AbstractCegarLoop]: Abstraction has 1365 states and 2477 transitions. [2019-10-15 01:51:36,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:51:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2477 transitions. [2019-10-15 01:51:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 01:51:36,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:36,806 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:36,806 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash -412581160, now seen corresponding path program 1 times [2019-10-15 01:51:36,807 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:36,807 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020499342] [2019-10-15 01:51:36,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:36,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:36,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:36,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020499342] [2019-10-15 01:51:36,985 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:36,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:51:36,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475119873] [2019-10-15 01:51:36,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:51:36,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:51:36,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:51:36,989 INFO L87 Difference]: Start difference. First operand 1365 states and 2477 transitions. Second operand 4 states. [2019-10-15 01:51:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:44,227 INFO L93 Difference]: Finished difference Result 5437 states and 9985 transitions. [2019-10-15 01:51:44,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:51:44,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-15 01:51:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:44,253 INFO L225 Difference]: With dead ends: 5437 [2019-10-15 01:51:44,253 INFO L226 Difference]: Without dead ends: 4077 [2019-10-15 01:51:44,258 INFO L600 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 [2019-10-15 01:51:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2019-10-15 01:51:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 4054. [2019-10-15 01:51:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4054 states. [2019-10-15 01:51:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4054 states to 4054 states and 7014 transitions. [2019-10-15 01:51:44,377 INFO L78 Accepts]: Start accepts. Automaton has 4054 states and 7014 transitions. Word has length 27 [2019-10-15 01:51:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:44,378 INFO L462 AbstractCegarLoop]: Abstraction has 4054 states and 7014 transitions. [2019-10-15 01:51:44,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:51:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4054 states and 7014 transitions. [2019-10-15 01:51:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 01:51:44,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:44,383 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:51:44,384 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:44,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1931742036, now seen corresponding path program 1 times [2019-10-15 01:51:44,384 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:44,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305467720] [2019-10-15 01:51:44,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:44,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:44,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:44,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305467720] [2019-10-15 01:51:44,587 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:44,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:51:44,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045198910] [2019-10-15 01:51:44,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:51:44,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:51:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:51:44,637 INFO L87 Difference]: Start difference. First operand 4054 states and 7014 transitions. Second operand 6 states. [2019-10-15 01:51:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:51,054 INFO L93 Difference]: Finished difference Result 12300 states and 21912 transitions. [2019-10-15 01:51:51,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:51:51,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2019-10-15 01:51:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:51,130 INFO L225 Difference]: With dead ends: 12300 [2019-10-15 01:51:51,130 INFO L226 Difference]: Without dead ends: 8251 [2019-10-15 01:51:51,142 INFO L600 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 [2019-10-15 01:51:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2019-10-15 01:51:51,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8182. [2019-10-15 01:51:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8182 states. [2019-10-15 01:51:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8182 states to 8182 states and 13906 transitions. [2019-10-15 01:51:51,405 INFO L78 Accepts]: Start accepts. Automaton has 8182 states and 13906 transitions. Word has length 65 [2019-10-15 01:51:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:51,406 INFO L462 AbstractCegarLoop]: Abstraction has 8182 states and 13906 transitions. [2019-10-15 01:51:51,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:51:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 8182 states and 13906 transitions. [2019-10-15 01:51:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 01:51:51,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:51,417 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:51:51,418 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:51,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1420576065, now seen corresponding path program 1 times [2019-10-15 01:51:51,418 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:51,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903404545] [2019-10-15 01:51:51,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:51,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:51,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:51,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903404545] [2019-10-15 01:51:51,623 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:51,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:51:51,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925617243] [2019-10-15 01:51:51,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:51:51,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:51,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:51:51,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:51:51,625 INFO L87 Difference]: Start difference. First operand 8182 states and 13906 transitions. Second operand 5 states.