/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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:41:02,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:41:02,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:41:02,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:41:02,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:41:02,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:41:02,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:41:02,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:41:02,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:41:02,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:41:02,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:41:02,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:41:02,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:41:02,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:41:02,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:41:02,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:41:02,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:41:02,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:41:02,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:41:02,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:41:02,724 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 01:41:02,737 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:41:02,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:41:02,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:41:02,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:41:02,739 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:41:02,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:41:02,739 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:41:02,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:41:02,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:41:02,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:41:02,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:41:02,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:41:02,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:41:02,740 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:41:02,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:41:02,741 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:41:02,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:41:02,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:41:02,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:41:02,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:41:02,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:41:02,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:41:02,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:41:02,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:41:02,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:41:02,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:41:02,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:41:02,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:41:02,743 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 01:41:03,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:41:03,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:41:03,049 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:41:03,050 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:41:03,051 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:41:03,051 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label56.c [2019-11-07 01:41:03,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b0eb2b3/173b6c020b854b3dbba69f6ff800b307/FLAGbb4ec1b23 [2019-11-07 01:41:03,706 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:41:03,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label56.c [2019-11-07 01:41:03,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b0eb2b3/173b6c020b854b3dbba69f6ff800b307/FLAGbb4ec1b23 [2019-11-07 01:41:03,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b0eb2b3/173b6c020b854b3dbba69f6ff800b307 [2019-11-07 01:41:03,981 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:41:03,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:41:03,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:03,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:41:03,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:41:03,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:03" (1/1) ... [2019-11-07 01:41:03,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ceec6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:03, skipping insertion in model container [2019-11-07 01:41:03,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:03" (1/1) ... [2019-11-07 01:41:03,998 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:41:04,044 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:41:04,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:04,595 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:41:04,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:41:04,722 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:41:04,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04 WrapperNode [2019-11-07 01:41:04,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:41:04,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:41:04,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:41:04,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:41:04,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04" (1/1) ... [2019-11-07 01:41:04,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04" (1/1) ... [2019-11-07 01:41:04,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04" (1/1) ... [2019-11-07 01:41:04,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04" (1/1) ... [2019-11-07 01:41:04,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04" (1/1) ... [2019-11-07 01:41:04,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04" (1/1) ... [2019-11-07 01:41:04,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04" (1/1) ... [2019-11-07 01:41:04,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:41:04,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:41:04,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:41:04,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:41:04,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04" (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 01:41:04,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:41:04,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:41:04,885 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:41:04,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:41:04,885 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:41:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:41:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:41:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:41:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:41:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:41:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:41:06,790 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:41:06,791 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:41:06,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:06 BoogieIcfgContainer [2019-11-07 01:41:06,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:41:06,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:41:06,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:41:06,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:41:06,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:41:03" (1/3) ... [2019-11-07 01:41:06,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d65a627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:06, skipping insertion in model container [2019-11-07 01:41:06,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:04" (2/3) ... [2019-11-07 01:41:06,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d65a627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:06, skipping insertion in model container [2019-11-07 01:41:06,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:06" (3/3) ... [2019-11-07 01:41:06,801 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label56.c [2019-11-07 01:41:06,811 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:41:06,819 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:41:06,831 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:41:06,856 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:41:06,857 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:41:06,857 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:41:06,857 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:41:06,857 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:41:06,858 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:41:06,858 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:41:06,858 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:41:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-11-07 01:41:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-07 01:41:06,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:06,889 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 01:41:06,891 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:06,897 INFO L82 PathProgramCache]: Analyzing trace with hash 989882550, now seen corresponding path program 1 times [2019-11-07 01:41:06,906 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:06,906 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46507340] [2019-11-07 01:41:06,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:07,357 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 01:41:07,358 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46507340] [2019-11-07 01:41:07,359 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:07,359 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:07,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825281854] [2019-11-07 01:41:07,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:07,373 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:07,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:07,395 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-11-07 01:41:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:07,963 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-11-07 01:41:07,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:07,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-07 01:41:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:07,989 INFO L225 Difference]: With dead ends: 273 [2019-11-07 01:41:07,989 INFO L226 Difference]: Without dead ends: 175 [2019-11-07 01:41:07,996 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 01:41:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-07 01:41:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-11-07 01:41:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:41:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-11-07 01:41:08,101 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-11-07 01:41:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:08,103 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-11-07 01:41:08,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-11-07 01:41:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-07 01:41:08,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:08,116 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 01:41:08,116 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:08,117 INFO L82 PathProgramCache]: Analyzing trace with hash -260139973, now seen corresponding path program 1 times [2019-11-07 01:41:08,117 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:08,117 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191107370] [2019-11-07 01:41:08,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:08,342 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 01:41:08,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191107370] [2019-11-07 01:41:08,343 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:08,343 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:41:08,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278936921] [2019-11-07 01:41:08,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:41:08,345 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:08,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:41:08,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:41:08,346 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-11-07 01:41:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:08,736 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-11-07 01:41:08,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:41:08,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-11-07 01:41:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:08,741 INFO L225 Difference]: With dead ends: 513 [2019-11-07 01:41:08,741 INFO L226 Difference]: Without dead ends: 343 [2019-11-07 01:41:08,743 INFO L630 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 [2019-11-07 01:41:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-11-07 01:41:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-11-07 01:41:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-11-07 01:41:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-11-07 01:41:08,771 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-11-07 01:41:08,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:08,771 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-11-07 01:41:08,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:41:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-11-07 01:41:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-07 01:41:08,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:08,778 INFO L410 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] [2019-11-07 01:41:08,778 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash 731901255, now seen corresponding path program 1 times [2019-11-07 01:41:08,779 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:08,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51637530] [2019-11-07 01:41:08,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:08,968 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51637530] [2019-11-07 01:41:08,968 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:41:08,968 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:41:08,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605257481] [2019-11-07 01:41:08,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:41:08,969 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:41:08,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:41:08,970 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 4 states. [2019-11-07 01:41:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:41:09,712 INFO L93 Difference]: Finished difference Result 1353 states and 2401 transitions. [2019-11-07 01:41:09,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:41:09,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2019-11-07 01:41:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:41:09,723 INFO L225 Difference]: With dead ends: 1353 [2019-11-07 01:41:09,723 INFO L226 Difference]: Without dead ends: 1015 [2019-11-07 01:41:09,726 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 01:41:09,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2019-11-07 01:41:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 1015. [2019-11-07 01:41:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2019-11-07 01:41:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1575 transitions. [2019-11-07 01:41:09,804 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1575 transitions. Word has length 100 [2019-11-07 01:41:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:41:09,805 INFO L462 AbstractCegarLoop]: Abstraction has 1015 states and 1575 transitions. [2019-11-07 01:41:09,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:41:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1575 transitions. [2019-11-07 01:41:09,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-07 01:41:09,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:41:09,810 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 01:41:09,811 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:41:09,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:41:09,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1551389941, now seen corresponding path program 1 times [2019-11-07 01:41:09,811 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:41:09,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594312642] [2019-11-07 01:41:09,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:41:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:09,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594312642] [2019-11-07 01:41:09,931 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823328000] [2019-11-07 01:41:09,931 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 01:41:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:41:10,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:41:10,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:41:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:10,121 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:41:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:41:10,258 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773018100] [2019-11-07 01:41:10,319 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-11-07 01:41:10,319 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:41:10,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:41:10,341 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:41:10,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:41:10,530 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-11-07 01:41:11,783 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 83 for LOIs [2019-11-07 01:41:13,105 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-11-07 01:41:13,377 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-11-07 01:41:13,707 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-11-07 01:41:14,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-11-07 01:41:14,573 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:41:14,804 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2019-11-07 01:41:15,170 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2019-11-07 01:41:15,694 WARN L191 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 89 [2019-11-07 01:41:16,401 WARN L191 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 102 [2019-11-07 01:41:16,659 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2019-11-07 01:41:16,865 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2019-11-07 01:41:17,087 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2019-11-07 01:41:17,394 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 85 [2019-11-07 01:41:18,235 WARN L191 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 108 [2019-11-07 01:41:18,560 WARN L191 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 75 [2019-11-07 01:41:18,704 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-11-07 01:41:18,989 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2019-11-07 01:41:19,296 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-11-07 01:41:19,589 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2019-11-07 01:41:19,898 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:20,174 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2019-11-07 01:41:20,477 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2019-11-07 01:41:20,772 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2019-11-07 01:41:21,140 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-11-07 01:41:21,427 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:21,704 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 01:41:22,032 WARN L191 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2019-11-07 01:41:22,343 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 01:41:22,650 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:22,963 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:23,287 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:23,681 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2019-11-07 01:41:23,987 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2019-11-07 01:41:24,322 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:24,673 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-07 01:41:25,023 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2019-11-07 01:41:25,460 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:25,815 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2019-11-07 01:41:26,150 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:26,497 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:26,828 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2019-11-07 01:41:27,205 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2019-11-07 01:41:27,570 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2019-11-07 01:41:27,944 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2019-11-07 01:41:28,320 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2019-11-07 01:41:28,717 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2019-11-07 01:41:29,114 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2019-11-07 01:41:29,158 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:41:29,158 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 44] total 54 [2019-11-07 01:41:29,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752126594] [2019-11-07 01:41:29,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-07 01:41:29,163 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:41:29,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-07 01:41:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2019-11-07 01:41:29,165 INFO L87 Difference]: Start difference. First operand 1015 states and 1575 transitions. Second operand 54 states. [2019-11-07 01:41:29,356 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-07 01:41:29,694 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 97 [2019-11-07 01:41:30,236 WARN L191 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 102 [2019-11-07 01:41:30,875 WARN L191 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 96 [2019-11-07 01:41:31,210 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2019-11-07 01:41:31,871 WARN L191 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 93 [2019-11-07 01:41:32,633 WARN L191 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2019-11-07 01:41:33,136 WARN L191 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 77 [2019-11-07 01:41:33,694 WARN L191 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 85 [2019-11-07 01:41:34,064 WARN L191 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2019-11-07 01:41:35,270 WARN L191 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2019-11-07 01:41:35,462 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2019-11-07 01:41:36,010 WARN L191 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 96 [2019-11-07 01:41:38,083 WARN L191 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 139 DAG size of output: 124 [2019-11-07 01:41:38,630 WARN L191 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 106 [2019-11-07 01:41:40,983 WARN L191 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 140 DAG size of output: 124 [2019-11-07 01:41:42,284 WARN L191 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 139 DAG size of output: 119 [2019-11-07 01:41:42,863 WARN L191 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 111