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/Problem02_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:36,827 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:42:36,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:42:36,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:42:36,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:42:36,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:42:36,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:42:36,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:42:36,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:42:36,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:42:36,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:42:36,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:42:36,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:42:36,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:42:36,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:42:36,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:36,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:36,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:36,881 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 01:42:36,915 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:36,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:36,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:36,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:36,918 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:36,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:36,918 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:36,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:36,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:36,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:36,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:36,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:36,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:36,921 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:36,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:36,921 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:36,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:36,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:36,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:36,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:36,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:36,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:36,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:36,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:36,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:36,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:36,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:36,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:36,924 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 01:42:37,229 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:37,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:37,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:37,248 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:37,248 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:37,249 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label42.c [2019-10-15 01:42:37,312 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e739beee/11226482b0bc4214b6077b3f8114aec0/FLAGfc2316428 [2019-10-15 01:42:37,881 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:37,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label42.c [2019-10-15 01:42:37,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e739beee/11226482b0bc4214b6077b3f8114aec0/FLAGfc2316428 [2019-10-15 01:42:38,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e739beee/11226482b0bc4214b6077b3f8114aec0 [2019-10-15 01:42:38,122 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:38,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:38,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:38,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:38,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:38,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38, skipping insertion in model container [2019-10-15 01:42:38,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,141 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:38,205 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:38,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:38,754 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:38,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:38,876 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:38,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38 WrapperNode [2019-10-15 01:42:38,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:38,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:38,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:38,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:38,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:38,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:39,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (1/1) ... [2019-10-15 01:42:39,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:39,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:39,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:39,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:39,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (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 01:42:39,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:39,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:39,121 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:39,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:39,122 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:39,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:39,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:39,124 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:39,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:39,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:39,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:41,746 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:41,747 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:41,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:41 BoogieIcfgContainer [2019-10-15 01:42:41,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:41,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:41,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:41,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:41,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:38" (1/3) ... [2019-10-15 01:42:41,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa35a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:41, skipping insertion in model container [2019-10-15 01:42:41,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:38" (2/3) ... [2019-10-15 01:42:41,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fa35a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:41, skipping insertion in model container [2019-10-15 01:42:41,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:41" (3/3) ... [2019-10-15 01:42:41,768 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label42.c [2019-10-15 01:42:41,780 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:41,793 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:41,806 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:41,848 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:41,848 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:41,850 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:41,851 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:41,851 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:41,851 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:41,851 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:41,852 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:41,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:41,902 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:41,905 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:41,912 INFO L82 PathProgramCache]: Analyzing trace with hash -219365577, now seen corresponding path program 1 times [2019-10-15 01:42:41,923 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:41,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245056826] [2019-10-15 01:42:41,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:41,924 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:41,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:42,422 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 01:42:42,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245056826] [2019-10-15 01:42:42,424 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:42,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:42,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164377722] [2019-10-15 01:42:42,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:42,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:42,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:42,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:42,448 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:43,042 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:43,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:43,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:43,067 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:43,068 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:43,074 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 01:42:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:42:43,163 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:42:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:43,164 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:42:43,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:42:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:42:43,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:43,170 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, 1, 1] [2019-10-15 01:42:43,170 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:43,171 INFO L82 PathProgramCache]: Analyzing trace with hash -701900356, now seen corresponding path program 1 times [2019-10-15 01:42:43,171 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:43,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672725747] [2019-10-15 01:42:43,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:43,312 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 01:42:43,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672725747] [2019-10-15 01:42:43,316 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:43,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:43,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022100032] [2019-10-15 01:42:43,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:43,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:43,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:43,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:43,323 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:42:43,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:43,763 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:42:43,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:43,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:42:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:43,768 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:42:43,769 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:42:43,771 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 01:42:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:42:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-15 01:42:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:42:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-10-15 01:42:43,808 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-10-15 01:42:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:43,809 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-10-15 01:42:43,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-10-15 01:42:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-15 01:42:43,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:43,822 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:43,822 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1247415816, now seen corresponding path program 1 times [2019-10-15 01:42:43,823 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:43,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471518985] [2019-10-15 01:42:43,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:43,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:44,023 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471518985] [2019-10-15 01:42:44,024 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:44,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:44,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207205237] [2019-10-15 01:42:44,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:44,026 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:44,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:44,031 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 3 states. [2019-10-15 01:42:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:44,494 INFO L93 Difference]: Finished difference Result 1017 states and 1776 transitions. [2019-10-15 01:42:44,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:44,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-15 01:42:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:44,501 INFO L225 Difference]: With dead ends: 1017 [2019-10-15 01:42:44,501 INFO L226 Difference]: Without dead ends: 679 [2019-10-15 01:42:44,503 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 01:42:44,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-15 01:42:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 511. [2019-10-15 01:42:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-10-15 01:42:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 811 transitions. [2019-10-15 01:42:44,535 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 811 transitions. Word has length 100 [2019-10-15 01:42:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:44,535 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 811 transitions. [2019-10-15 01:42:44,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 811 transitions. [2019-10-15 01:42:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 01:42:44,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:44,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:44,539 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1843553044, now seen corresponding path program 1 times [2019-10-15 01:42:44,540 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:44,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591606702] [2019-10-15 01:42:44,540 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:44,541 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:44,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-15 01:42:44,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591606702] [2019-10-15 01:42:44,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039771595] [2019-10-15 01:42:44,636 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 01:42:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:44,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:44,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:44,835 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:45,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518797676] [2019-10-15 01:42:45,040 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:45,040 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:45,047 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:45,056 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:45,056 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:45,392 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:45,981 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 139 [2019-10-15 01:42:46,466 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 136 [2019-10-15 01:42:47,787 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 88 for LOIs [2019-10-15 01:42:57,542 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-15 01:42:57,590 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7912 conjuctions. This might take some time... [2019-10-15 01:42:58,107 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:42:58,195 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11928 conjuctions. This might take some time... [2019-10-15 01:42:58,917 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:42:59,001 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11928 conjuctions. This might take some time... [2019-10-15 01:42:59,795 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:59,810 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:00,092 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2019-10-15 01:43:00,323 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:00,624 WARN L191 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:01,187 WARN L191 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 95 [2019-10-15 01:43:01,543 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2019-10-15 01:43:01,863 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2019-10-15 01:43:02,121 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2019-10-15 01:43:02,409 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2019-10-15 01:43:03,195 WARN L191 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 91 [2019-10-15 01:43:03,569 WARN L191 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2019-10-15 01:43:03,847 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2019-10-15 01:43:08,408 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:08,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 22 [2019-10-15 01:43:08,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342789541] [2019-10-15 01:43:08,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:43:08,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:08,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:43:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:43:08,412 INFO L87 Difference]: Start difference. First operand 511 states and 811 transitions. Second operand 22 states. [2019-10-15 01:43:08,763 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:09,104 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 87 [2019-10-15 01:43:09,549 WARN L191 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 93 [2019-10-15 01:43:10,048 WARN L191 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 90 [2019-10-15 01:43:10,432 WARN L191 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:43:10,787 WARN L191 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:43:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:13,957 INFO L93 Difference]: Finished difference Result 1235 states and 2085 transitions. [2019-10-15 01:43:13,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 01:43:13,961 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 123 [2019-10-15 01:43:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:13,966 INFO L225 Difference]: With dead ends: 1235 [2019-10-15 01:43:13,967 INFO L226 Difference]: Without dead ends: 729 [2019-10-15 01:43:13,972 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 269 SyntacticMatches, 94 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:43:13,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2019-10-15 01:43:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 700. [2019-10-15 01:43:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-10-15 01:43:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1006 transitions. [2019-10-15 01:43:14,046 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1006 transitions. Word has length 123 [2019-10-15 01:43:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:14,046 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1006 transitions. [2019-10-15 01:43:14,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:43:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1006 transitions. [2019-10-15 01:43:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:43:14,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:14,052 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:43:14,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:14,258 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:14,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1238318118, now seen corresponding path program 1 times [2019-10-15 01:43:14,259 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:14,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690950025] [2019-10-15 01:43:14,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:14,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:14,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:14,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690950025] [2019-10-15 01:43:14,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817311126] [2019-10-15 01:43:14,431 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 01:43:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:14,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:43:14,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:14,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:14,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079701947] [2019-10-15 01:43:14,697 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:43:14,698 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:14,699 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:14,699 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:14,699 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:14,837 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs