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/Problem16_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:55:52,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:55:52,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:55:52,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:55:52,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:55:52,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:55:52,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:55:52,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:55:52,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:55:52,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:55:52,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:55:52,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:55:52,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:55:52,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:55:52,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:55:52,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:55:52,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:55:52,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:55:52,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:55:52,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:55:52,826 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 01:55:52,859 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:55:52,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:55:52,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:55:52,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:55:52,862 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:55:52,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:55:52,863 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:55:52,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:55:52,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:55:52,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:55:52,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:55:52,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:55:52,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:55:52,866 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:55:52,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:55:52,867 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:55:52,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:55:52,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:55:52,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:55:52,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:55:52,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:55:52,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:55:52,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:55:52,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:55:52,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:55:52,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:55:52,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:55:52,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:55:52,870 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 01:55:53,162 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:55:53,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:55:53,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:55:53,182 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:55:53,182 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:55:53,183 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-10-15 01:55:53,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afb261ae0/1595090da3084c059013eaeb2c71dc08/FLAG86f5768ed [2019-10-15 01:55:53,928 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:55:53,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-10-15 01:55:53,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afb261ae0/1595090da3084c059013eaeb2c71dc08/FLAG86f5768ed [2019-10-15 01:55:54,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afb261ae0/1595090da3084c059013eaeb2c71dc08 [2019-10-15 01:55:54,144 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:55:54,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:55:54,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:54,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:55:54,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:55:54,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:54" (1/1) ... [2019-10-15 01:55:54,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:54, skipping insertion in model container [2019-10-15 01:55:54,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:54" (1/1) ... [2019-10-15 01:55:54,166 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:55:54,246 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:55:55,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:55,028 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:55:55,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:55,611 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:55:55,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55 WrapperNode [2019-10-15 01:55:55,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:55,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:55:55,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:55:55,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:55:55,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55" (1/1) ... [2019-10-15 01:55:55,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55" (1/1) ... [2019-10-15 01:55:55,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55" (1/1) ... [2019-10-15 01:55:55,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55" (1/1) ... [2019-10-15 01:55:55,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55" (1/1) ... [2019-10-15 01:55:55,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55" (1/1) ... [2019-10-15 01:55:55,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55" (1/1) ... [2019-10-15 01:55:55,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:55:55,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:55:55,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:55:55,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:55:55,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55" (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 01:55:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:55:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:55:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:55:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:55:55,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:55:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:55:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:55:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:55:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:55:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:55:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:55:55,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:55:55,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:56:17,867 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:56:17,867 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:56:17,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:17 BoogieIcfgContainer [2019-10-15 01:56:17,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:56:17,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:56:17,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:56:17,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:56:17,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:55:54" (1/3) ... [2019-10-15 01:56:17,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4686fce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:17, skipping insertion in model container [2019-10-15 01:56:17,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:55" (2/3) ... [2019-10-15 01:56:17,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4686fce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:17, skipping insertion in model container [2019-10-15 01:56:17,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:17" (3/3) ... [2019-10-15 01:56:17,882 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label21.c [2019-10-15 01:56:17,890 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:56:17,899 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:56:17,911 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:56:17,951 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:56:17,952 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:56:17,952 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:56:17,953 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:56:17,953 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:56:17,953 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:56:17,953 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:56:17,953 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:56:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:56:17,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:56:17,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:17,984 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:17,985 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:17,991 INFO L82 PathProgramCache]: Analyzing trace with hash 863562559, now seen corresponding path program 1 times [2019-10-15 01:56:17,999 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:18,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468379560] [2019-10-15 01:56:18,000 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:18,000 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:18,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:18,230 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 01:56:18,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468379560] [2019-10-15 01:56:18,233 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:18,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:56:18,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411784565] [2019-10-15 01:56:18,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:56:18,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:18,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:56:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:56:18,256 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:56:19,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:19,950 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:56:19,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:56:19,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:56:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:19,971 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:56:19,971 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:56:19,978 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:56:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:56:20,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2019-10-15 01:56:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-15 01:56:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 867 transitions. [2019-10-15 01:56:20,060 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 867 transitions. Word has length 11 [2019-10-15 01:56:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:20,060 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 867 transitions. [2019-10-15 01:56:20,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:56:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 867 transitions. [2019-10-15 01:56:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-15 01:56:20,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:20,064 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] [2019-10-15 01:56:20,064 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash 9419049, now seen corresponding path program 1 times [2019-10-15 01:56:20,065 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:20,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2152333] [2019-10-15 01:56:20,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:20,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:20,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:20,280 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 01:56:20,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2152333] [2019-10-15 01:56:20,280 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:20,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:56:20,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308155535] [2019-10-15 01:56:20,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:56:20,283 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:20,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:56:20,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:56:20,284 INFO L87 Difference]: Start difference. First operand 467 states and 867 transitions. Second operand 6 states. [2019-10-15 01:56:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:22,368 INFO L93 Difference]: Finished difference Result 1405 states and 2643 transitions. [2019-10-15 01:56:22,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:56:22,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2019-10-15 01:56:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:22,380 INFO L225 Difference]: With dead ends: 1405 [2019-10-15 01:56:22,380 INFO L226 Difference]: Without dead ends: 943 [2019-10-15 01:56:22,382 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 01:56:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2019-10-15 01:56:22,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 919. [2019-10-15 01:56:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2019-10-15 01:56:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1683 transitions. [2019-10-15 01:56:22,442 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1683 transitions. Word has length 59 [2019-10-15 01:56:22,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:22,443 INFO L462 AbstractCegarLoop]: Abstraction has 919 states and 1683 transitions. [2019-10-15 01:56:22,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:56:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1683 transitions. [2019-10-15 01:56:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-15 01:56:22,445 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:22,446 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] [2019-10-15 01:56:22,446 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:22,446 INFO L82 PathProgramCache]: Analyzing trace with hash 704523306, now seen corresponding path program 1 times [2019-10-15 01:56:22,447 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:22,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700916799] [2019-10-15 01:56:22,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:22,447 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:22,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:22,606 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 01:56:22,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700916799] [2019-10-15 01:56:22,608 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:22,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:56:22,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831139018] [2019-10-15 01:56:22,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:56:22,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:22,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:56:22,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:56:22,615 INFO L87 Difference]: Start difference. First operand 919 states and 1683 transitions. Second operand 6 states. [2019-10-15 01:56:25,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:25,699 INFO L93 Difference]: Finished difference Result 2757 states and 5097 transitions. [2019-10-15 01:56:25,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:56:25,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2019-10-15 01:56:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:25,711 INFO L225 Difference]: With dead ends: 2757 [2019-10-15 01:56:25,711 INFO L226 Difference]: Without dead ends: 1843 [2019-10-15 01:56:25,714 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 01:56:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2019-10-15 01:56:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1172. [2019-10-15 01:56:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2019-10-15 01:56:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 2056 transitions. [2019-10-15 01:56:25,780 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 2056 transitions. Word has length 62 [2019-10-15 01:56:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:25,780 INFO L462 AbstractCegarLoop]: Abstraction has 1172 states and 2056 transitions. [2019-10-15 01:56:25,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:56:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 2056 transitions. [2019-10-15 01:56:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 01:56:25,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:25,794 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:25,795 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash -569651312, now seen corresponding path program 1 times [2019-10-15 01:56:25,795 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:25,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98943156] [2019-10-15 01:56:25,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:25,796 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:25,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:56:26,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98943156] [2019-10-15 01:56:26,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158061909] [2019-10-15 01:56:26,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:56:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:26,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:56:26,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:56:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:56:26,367 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:56:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:56:26,513 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:56:26,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:56:26,513 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694420124] [2019-10-15 01:56:26,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:56:26,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:26,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:56:26,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:56:26,518 INFO L87 Difference]: Start difference. First operand 1172 states and 2056 transitions. Second operand 5 states. [2019-10-15 01:56:28,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:28,732 INFO L93 Difference]: Finished difference Result 3294 states and 5825 transitions. [2019-10-15 01:56:28,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:56:28,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-10-15 01:56:28,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:28,750 INFO L225 Difference]: With dead ends: 3294 [2019-10-15 01:56:28,750 INFO L226 Difference]: Without dead ends: 2127 [2019-10-15 01:56:28,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:56:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2019-10-15 01:56:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2106. [2019-10-15 01:56:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2106 states. [2019-10-15 01:56:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3256 transitions. [2019-10-15 01:56:28,856 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3256 transitions. Word has length 118 [2019-10-15 01:56:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:28,857 INFO L462 AbstractCegarLoop]: Abstraction has 2106 states and 3256 transitions. [2019-10-15 01:56:28,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:56:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3256 transitions. [2019-10-15 01:56:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-15 01:56:28,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:28,864 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:56:29,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:56:29,083 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash -182691311, now seen corresponding path program 1 times [2019-10-15 01:56:29,084 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:29,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296994734] [2019-10-15 01:56:29,084 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:29,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:29,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 20 proven. 117 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-15 01:56:29,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296994734] [2019-10-15 01:56:29,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936606799] [2019-10-15 01:56:29,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:56:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:29,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:56:29,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:56:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:56:29,610 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:56:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 58 proven. 51 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-15 01:56:29,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437324268] [2019-10-15 01:56:29,731 INFO L162 IcfgInterpreter]: Started Sifa with 63 locations of interest [2019-10-15 01:56:29,732 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:56:29,737 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:56:29,745 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:56:29,746 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:56:29,883 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2019-10-15 01:56:29,981 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-10-15 01:56:30,129 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 32 [2019-10-15 01:56:30,238 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 29 [2019-10-15 01:56:30,325 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 29 [2019-10-15 01:56:31,357 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs [2019-10-15 01:56:31,475 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-15 01:56:32,617 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 32520 conjuctions. This might take some time...