/usr/bin/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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:40:05,776 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:40:05,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:40:05,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:40:05,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:40:05,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:40:05,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:40:05,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:40:05,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:40:05,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:40:05,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:40:05,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:40:05,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:40:05,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:40:05,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:40:05,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:40:05,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:40:05,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:40:05,867 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 [2019-11-07 01:40:05,889 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:40:05,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:40:05,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:40:05,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:40:05,893 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:40:05,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:40:05,893 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:40:05,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:40:05,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:40:05,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:40:05,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:40:05,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:40:05,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:40:05,896 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:40:05,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:40:05,896 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:40:05,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:40:05,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:40:05,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:40:05,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:40:05,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:40:05,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:40:05,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:40:05,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:40:05,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:40:05,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:40:05,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:40:05,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:40:05,899 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 [2019-11-07 01:40:06,161 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:40:06,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:40:06,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:40:06,179 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:40:06,179 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:40:06,180 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-11-07 01:40:06,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3adae39/a4cf6a966a024b0cae2d9ce33faa6fb9/FLAGc183bcefc [2019-11-07 01:40:06,796 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:40:06,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-11-07 01:40:06,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3adae39/a4cf6a966a024b0cae2d9ce33faa6fb9/FLAGc183bcefc [2019-11-07 01:40:07,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd3adae39/a4cf6a966a024b0cae2d9ce33faa6fb9 [2019-11-07 01:40:07,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:40:07,099 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:40:07,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:40:07,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:40:07,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:40:07,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:07" (1/1) ... [2019-11-07 01:40:07,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50356fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07, skipping insertion in model container [2019-11-07 01:40:07,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:07" (1/1) ... [2019-11-07 01:40:07,115 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:40:07,175 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:40:07,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:40:07,667 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:40:07,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:40:07,821 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:40:07,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07 WrapperNode [2019-11-07 01:40:07,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:40:07,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:40:07,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:40:07,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:40:07,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07" (1/1) ... [2019-11-07 01:40:07,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07" (1/1) ... [2019-11-07 01:40:07,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07" (1/1) ... [2019-11-07 01:40:07,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07" (1/1) ... [2019-11-07 01:40:07,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07" (1/1) ... [2019-11-07 01:40:07,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07" (1/1) ... [2019-11-07 01:40:07,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07" (1/1) ... [2019-11-07 01:40:07,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:40:07,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:40:07,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:40:07,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:40:07,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07" (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 [2019-11-07 01:40:08,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:40:08,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:40:08,021 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:40:08,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:40:08,022 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:40:08,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:40:08,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:40:08,023 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:40:08,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:40:08,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:40:08,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:40:10,245 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:40:10,245 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:40:10,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:10 BoogieIcfgContainer [2019-11-07 01:40:10,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:40:10,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:40:10,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:40:10,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:40:10,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:40:07" (1/3) ... [2019-11-07 01:40:10,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d75f1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:10, skipping insertion in model container [2019-11-07 01:40:10,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:07" (2/3) ... [2019-11-07 01:40:10,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d75f1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:10, skipping insertion in model container [2019-11-07 01:40:10,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:10" (3/3) ... [2019-11-07 01:40:10,256 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label45.c [2019-11-07 01:40:10,267 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:40:10,275 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:40:10,288 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:40:10,316 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:40:10,316 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:40:10,317 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:40:10,317 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:40:10,317 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:40:10,317 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:40:10,317 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:40:10,318 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:40:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:40:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:40:10,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:10,353 INFO L410 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] [2019-11-07 01:40:10,356 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash -219486466, now seen corresponding path program 1 times [2019-11-07 01:40:10,374 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:10,374 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897174906] [2019-11-07 01:40:10,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:10,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897174906] [2019-11-07 01:40:10,892 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:10,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:40:10,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004522468] [2019-11-07 01:40:10,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:10,904 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:10,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:10,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:40:10,923 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:40:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:11,580 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:40:11,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:11,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:40:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:11,609 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:40:11,609 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:40:11,616 INFO L630 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 [2019-11-07 01:40:11,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:40:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:40:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:40:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-11-07 01:40:11,682 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-11-07 01:40:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:11,683 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-11-07 01:40:11,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-11-07 01:40:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:40:11,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:11,689 INFO L410 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] [2019-11-07 01:40:11,690 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:11,692 INFO L82 PathProgramCache]: Analyzing trace with hash -702021245, now seen corresponding path program 1 times [2019-11-07 01:40:11,693 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:11,693 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542840366] [2019-11-07 01:40:11,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:11,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542840366] [2019-11-07 01:40:11,822 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:11,822 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:40:11,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135887931] [2019-11-07 01:40:11,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:40:11,825 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:11,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:40:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:40:11,825 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 4 states. [2019-11-07 01:40:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:12,657 INFO L93 Difference]: Finished difference Result 681 states and 1261 transitions. [2019-11-07 01:40:12,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:40:12,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-11-07 01:40:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:12,669 INFO L225 Difference]: With dead ends: 681 [2019-11-07 01:40:12,670 INFO L226 Difference]: Without dead ends: 511 [2019-11-07 01:40:12,672 INFO L630 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 [2019-11-07 01:40:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2019-11-07 01:40:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2019-11-07 01:40:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-11-07 01:40:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 836 transitions. [2019-11-07 01:40:12,725 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 836 transitions. Word has length 94 [2019-11-07 01:40:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:12,726 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 836 transitions. [2019-11-07 01:40:12,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:40:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 836 transitions. [2019-11-07 01:40:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-07 01:40:12,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:12,733 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:12,733 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:12,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1307424922, now seen corresponding path program 1 times [2019-11-07 01:40:12,734 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:12,734 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059926416] [2019-11-07 01:40:12,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:12,869 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059926416] [2019-11-07 01:40:12,869 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:12,869 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:40:12,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984540537] [2019-11-07 01:40:12,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:40:12,871 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:12,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:40:12,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:12,871 INFO L87 Difference]: Start difference. First operand 511 states and 836 transitions. Second operand 6 states. [2019-11-07 01:40:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:13,560 INFO L93 Difference]: Finished difference Result 1237 states and 2158 transitions. [2019-11-07 01:40:13,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:40:13,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-11-07 01:40:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:13,571 INFO L225 Difference]: With dead ends: 1237 [2019-11-07 01:40:13,571 INFO L226 Difference]: Without dead ends: 731 [2019-11-07 01:40:13,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:40:13,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2019-11-07 01:40:13,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 703. [2019-11-07 01:40:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2019-11-07 01:40:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1139 transitions. [2019-11-07 01:40:13,680 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1139 transitions. Word has length 108 [2019-11-07 01:40:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:13,681 INFO L462 AbstractCegarLoop]: Abstraction has 703 states and 1139 transitions. [2019-11-07 01:40:13,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:40:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1139 transitions. [2019-11-07 01:40:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-07 01:40:13,686 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:13,686 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:13,687 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:13,687 INFO L82 PathProgramCache]: Analyzing trace with hash -650311126, now seen corresponding path program 1 times [2019-11-07 01:40:13,687 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:13,688 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482882878] [2019-11-07 01:40:13,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:13,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482882878] [2019-11-07 01:40:13,889 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:13,889 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:40:13,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127512552] [2019-11-07 01:40:13,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:40:13,890 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:13,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:40:13,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:13,891 INFO L87 Difference]: Start difference. First operand 703 states and 1139 transitions. Second operand 6 states. [2019-11-07 01:40:14,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:14,886 INFO L93 Difference]: Finished difference Result 1725 states and 2992 transitions. [2019-11-07 01:40:14,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-07 01:40:14,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-11-07 01:40:14,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:14,895 INFO L225 Difference]: With dead ends: 1725 [2019-11-07 01:40:14,896 INFO L226 Difference]: Without dead ends: 1027 [2019-11-07 01:40:14,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:40:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2019-11-07 01:40:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 997. [2019-11-07 01:40:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2019-11-07 01:40:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1484 transitions. [2019-11-07 01:40:14,992 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1484 transitions. Word has length 110 [2019-11-07 01:40:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:14,993 INFO L462 AbstractCegarLoop]: Abstraction has 997 states and 1484 transitions. [2019-11-07 01:40:14,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:40:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1484 transitions. [2019-11-07 01:40:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-07 01:40:14,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:14,999 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:14,999 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:15,000 INFO L82 PathProgramCache]: Analyzing trace with hash -72689956, now seen corresponding path program 1 times [2019-11-07 01:40:15,000 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:15,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475909373] [2019-11-07 01:40:15,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:15,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475909373] [2019-11-07 01:40:15,125 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:40:15,125 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:40:15,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318872536] [2019-11-07 01:40:15,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:40:15,126 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:40:15,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:40:15,127 INFO L87 Difference]: Start difference. First operand 997 states and 1484 transitions. Second operand 6 states. [2019-11-07 01:40:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:15,901 INFO L93 Difference]: Finished difference Result 2743 states and 4368 transitions. [2019-11-07 01:40:15,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:40:15,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2019-11-07 01:40:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:15,919 INFO L225 Difference]: With dead ends: 2743 [2019-11-07 01:40:15,921 INFO L226 Difference]: Without dead ends: 1751 [2019-11-07 01:40:15,925 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:40:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2019-11-07 01:40:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1711. [2019-11-07 01:40:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1711 states. [2019-11-07 01:40:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2392 transitions. [2019-11-07 01:40:16,015 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2392 transitions. Word has length 117 [2019-11-07 01:40:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:16,015 INFO L462 AbstractCegarLoop]: Abstraction has 1711 states and 2392 transitions. [2019-11-07 01:40:16,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:40:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2392 transitions. [2019-11-07 01:40:16,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-07 01:40:16,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:16,023 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:40:16,023 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:16,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:16,024 INFO L82 PathProgramCache]: Analyzing trace with hash 5219257, now seen corresponding path program 1 times [2019-11-07 01:40:16,024 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:16,024 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099699566] [2019-11-07 01:40:16,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:40:16,272 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099699566] [2019-11-07 01:40:16,272 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939002403] [2019-11-07 01:40:16,272 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 [2019-11-07 01:40:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:16,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:40:16,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:40:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:40:16,467 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:40:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:40:16,545 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:40:16,545 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-11-07 01:40:16,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147767580] [2019-11-07 01:40:16,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:40:16,548 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:16,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:40:16,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:40:16,549 INFO L87 Difference]: Start difference. First operand 1711 states and 2392 transitions. Second operand 3 states. [2019-11-07 01:40:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:40:17,057 INFO L93 Difference]: Finished difference Result 4009 states and 5605 transitions. [2019-11-07 01:40:17,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:40:17,057 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-11-07 01:40:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:40:17,072 INFO L225 Difference]: With dead ends: 4009 [2019-11-07 01:40:17,072 INFO L226 Difference]: Without dead ends: 1521 [2019-11-07 01:40:17,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:40:17,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2019-11-07 01:40:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1521. [2019-11-07 01:40:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1521 states. [2019-11-07 01:40:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2002 transitions. [2019-11-07 01:40:17,151 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2002 transitions. Word has length 121 [2019-11-07 01:40:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:40:17,153 INFO L462 AbstractCegarLoop]: Abstraction has 1521 states and 2002 transitions. [2019-11-07 01:40:17,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:40:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2002 transitions. [2019-11-07 01:40:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-07 01:40:17,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:40:17,159 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-07 01:40:17,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:40:17,365 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:40:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:40:17,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2015126325, now seen corresponding path program 1 times [2019-11-07 01:40:17,366 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:40:17,367 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630495498] [2019-11-07 01:40:17,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:40:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 01:40:17,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630495498] [2019-11-07 01:40:17,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857908657] [2019-11-07 01:40:17,520 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 [2019-11-07 01:40:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:40:17,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:40:17,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:40:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-07 01:40:17,680 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:40:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-07 01:40:17,758 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70824491] [2019-11-07 01:40:17,796 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:40:17,796 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:40:17,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:40:17,810 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:40:17,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:40:17,978 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-11-07 01:40:19,135 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 84 for LOIs [2019-11-07 01:40:21,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:40:21,220 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:40:21,477 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2019-11-07 01:40:21,825 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2019-11-07 01:40:22,379 WARN L191 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 86 [2019-11-07 01:40:22,822 WARN L191 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 79 [2019-11-07 01:40:23,096 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2019-11-07 01:40:23,327 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2019-11-07 01:40:23,562 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-11-07 01:40:23,898 WARN L191 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2019-11-07 01:40:24,318 WARN L191 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2019-11-07 01:40:24,631 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2019-11-07 01:40:25,018 WARN L191 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2019-11-07 01:40:25,386 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2019-11-07 01:40:25,702 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2019-11-07 01:40:26,003 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:26,347 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2019-11-07 01:40:26,642 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2019-11-07 01:40:26,967 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2019-11-07 01:40:27,288 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2019-11-07 01:40:27,644 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:27,950 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2019-11-07 01:40:28,339 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2019-11-07 01:40:28,648 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2019-11-07 01:40:28,995 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:29,310 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:29,635 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:30,025 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2019-11-07 01:40:30,356 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2019-11-07 01:40:30,681 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:31,019 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2019-11-07 01:40:31,396 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2019-11-07 01:40:31,837 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:32,217 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2019-11-07 01:40:32,545 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:32,903 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:33,258 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2019-11-07 01:40:33,643 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2019-11-07 01:40:34,046 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2019-11-07 01:40:34,456 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2019-11-07 01:40:34,835 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-07 01:40:35,235 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2019-11-07 01:40:35,635 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2019-11-07 01:40:35,699 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:40:35,699 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 44] total 52 [2019-11-07 01:40:35,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107076190] [2019-11-07 01:40:35,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-07 01:40:35,704 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:40:35,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-07 01:40:35,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2019-11-07 01:40:35,714 INFO L87 Difference]: Start difference. First operand 1521 states and 2002 transitions. Second operand 52 states. [2019-11-07 01:40:35,899 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:40:36,298 WARN L191 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2019-11-07 01:40:36,642 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 97 [2019-11-07 01:40:37,092 WARN L191 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 94 [2019-11-07 01:40:37,418 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2019-11-07 01:40:38,144 WARN L191 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 93 [2019-11-07 01:40:39,538 WARN L191 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 140 DAG size of output: 124 [2019-11-07 01:40:39,765 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2019-11-07 01:40:40,127 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2019-11-07 01:40:40,613 WARN L191 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2019-11-07 01:40:40,878 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 73 [2019-11-07 01:40:41,167 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-11-07 01:40:41,705 WARN L191 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 94 [2019-11-07 01:40:42,274 WARN L191 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 101 [2019-11-07 01:40:43,083 WARN L191 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 107 [2019-11-07 01:40:43,762 WARN L191 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 113 [2019-11-07 01:40:44,557 WARN L191 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 120 [2019-11-07 01:40:45,351 WARN L191 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 123 [2019-11-07 01:40:46,510 WARN L191 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 137 DAG size of output: 132