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/Problem15_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:43,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:43,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:43,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:44,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:44,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:44,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:44,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:44,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:44,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:44,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:44,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:44,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:44,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:44,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:44,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:44,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:54:44,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:44,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:44,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:44,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:54:44,066 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:44,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:44,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:44,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:44,068 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:44,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:44,069 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:44,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:44,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:44,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:44,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:44,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:44,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:44,071 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:44,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:44,072 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:44,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:44,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:44,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:44,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:44,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:44,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:44,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:44,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:44,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:44,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:44,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:44,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:44,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:54:44,319 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:44,331 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:44,334 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:44,336 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:44,336 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:44,337 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-10-15 01:54:44,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f195d516/1e84c2edbb554e9db671595784837352/FLAGde44564be [2019-10-15 01:54:45,048 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:45,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-10-15 01:54:45,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f195d516/1e84c2edbb554e9db671595784837352/FLAGde44564be [2019-10-15 01:54:45,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f195d516/1e84c2edbb554e9db671595784837352 [2019-10-15 01:54:45,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:45,219 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:45,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:45,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:45,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:45,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:45" (1/1) ... [2019-10-15 01:54:45,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20555884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:45, skipping insertion in model container [2019-10-15 01:54:45,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:45" (1/1) ... [2019-10-15 01:54:45,236 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:45,326 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:46,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:46,155 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:46,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:46,584 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:46,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46 WrapperNode [2019-10-15 01:54:46,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:46,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:46,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:46,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:46,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46" (1/1) ... [2019-10-15 01:54:46,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46" (1/1) ... [2019-10-15 01:54:46,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46" (1/1) ... [2019-10-15 01:54:46,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46" (1/1) ... [2019-10-15 01:54:46,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46" (1/1) ... [2019-10-15 01:54:46,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46" (1/1) ... [2019-10-15 01:54:46,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46" (1/1) ... [2019-10-15 01:54:46,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:46,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:46,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:46,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:46,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:46,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:46,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:46,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:46,872 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:46,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:46,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:46,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:55:01,107 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:55:01,108 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:55:01,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:01 BoogieIcfgContainer [2019-10-15 01:55:01,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:55:01,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:55:01,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:55:01,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:55:01,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:45" (1/3) ... [2019-10-15 01:55:01,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc17675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:01, skipping insertion in model container [2019-10-15 01:55:01,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:46" (2/3) ... [2019-10-15 01:55:01,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc17675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:01, skipping insertion in model container [2019-10-15 01:55:01,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:01" (3/3) ... [2019-10-15 01:55:01,122 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label40.c [2019-10-15 01:55:01,132 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:55:01,143 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:55:01,154 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:55:01,191 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:55:01,191 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:55:01,191 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:55:01,191 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:55:01,191 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:55:01,192 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:55:01,192 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:55:01,192 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:55:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:55:01,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:55:01,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:01,221 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:01,223 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:01,227 INFO L82 PathProgramCache]: Analyzing trace with hash 648045933, now seen corresponding path program 1 times [2019-10-15 01:55:01,233 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:01,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981402011] [2019-10-15 01:55:01,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:01,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:01,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:01,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981402011] [2019-10-15 01:55:01,426 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:01,426 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:01,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884508506] [2019-10-15 01:55:01,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:01,431 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:01,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:01,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:01,447 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:55:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:05,193 INFO L93 Difference]: Finished difference Result 953 states and 1850 transitions. [2019-10-15 01:55:05,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:05,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:55:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:05,217 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:55:05,217 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:55:05,226 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:05,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:55:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 469. [2019-10-15 01:55:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-15 01:55:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2019-10-15 01:55:05,315 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2019-10-15 01:55:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:05,315 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2019-10-15 01:55:05,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2019-10-15 01:55:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:55:05,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:05,317 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:05,318 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:05,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:05,318 INFO L82 PathProgramCache]: Analyzing trace with hash 406805821, now seen corresponding path program 1 times [2019-10-15 01:55:05,318 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:05,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909081968] [2019-10-15 01:55:05,319 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:05,319 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:05,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:05,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909081968] [2019-10-15 01:55:05,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639357063] [2019-10-15 01:55:05,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:05,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:55:05,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:05,702 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:05,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:05,869 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:55:05,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 11 [2019-10-15 01:55:05,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637841692] [2019-10-15 01:55:05,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:55:05,872 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:55:05,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:55:05,872 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand 7 states. [2019-10-15 01:55:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:12,330 INFO L93 Difference]: Finished difference Result 1637 states and 2539 transitions. [2019-10-15 01:55:12,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:55:12,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-10-15 01:55:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:12,339 INFO L225 Difference]: With dead ends: 1637 [2019-10-15 01:55:12,340 INFO L226 Difference]: Without dead ends: 1173 [2019-10-15 01:55:12,342 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-10-15 01:55:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2019-10-15 01:55:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 933. [2019-10-15 01:55:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2019-10-15 01:55:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1358 transitions. [2019-10-15 01:55:12,399 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1358 transitions. Word has length 21 [2019-10-15 01:55:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:12,399 INFO L462 AbstractCegarLoop]: Abstraction has 933 states and 1358 transitions. [2019-10-15 01:55:12,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:55:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1358 transitions. [2019-10-15 01:55:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:55:12,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:12,400 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:12,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:12,605 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:12,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1517665072, now seen corresponding path program 1 times [2019-10-15 01:55:12,611 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:12,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126484969] [2019-10-15 01:55:12,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:12,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:12,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:12,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126484969] [2019-10-15 01:55:12,751 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:12,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:55:12,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443482673] [2019-10-15 01:55:12,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:55:12,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:12,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:55:12,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:55:12,754 INFO L87 Difference]: Start difference. First operand 933 states and 1358 transitions. Second operand 6 states. [2019-10-15 01:55:18,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:18,212 INFO L93 Difference]: Finished difference Result 2601 states and 3983 transitions. [2019-10-15 01:55:18,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:18,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-15 01:55:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:18,230 INFO L225 Difference]: With dead ends: 2601 [2019-10-15 01:55:18,230 INFO L226 Difference]: Without dead ends: 1673 [2019-10-15 01:55:18,233 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:55:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2019-10-15 01:55:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1588. [2019-10-15 01:55:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1588 states. [2019-10-15 01:55:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 2364 transitions. [2019-10-15 01:55:18,339 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 2364 transitions. Word has length 26 [2019-10-15 01:55:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:18,339 INFO L462 AbstractCegarLoop]: Abstraction has 1588 states and 2364 transitions. [2019-10-15 01:55:18,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:55:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 2364 transitions. [2019-10-15 01:55:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:55:18,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:18,341 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:18,342 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:18,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1597082628, now seen corresponding path program 1 times [2019-10-15 01:55:18,343 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:18,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101849451] [2019-10-15 01:55:18,343 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:18,343 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:18,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:18,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101849451] [2019-10-15 01:55:18,428 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:18,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:18,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937727429] [2019-10-15 01:55:18,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:18,429 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:18,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:18,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:18,430 INFO L87 Difference]: Start difference. First operand 1588 states and 2364 transitions. Second operand 4 states. [2019-10-15 01:55:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:21,788 INFO L93 Difference]: Finished difference Result 5005 states and 7646 transitions. [2019-10-15 01:55:21,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:21,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-15 01:55:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:21,810 INFO L225 Difference]: With dead ends: 5005 [2019-10-15 01:55:21,811 INFO L226 Difference]: Without dead ends: 3422 [2019-10-15 01:55:21,815 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2019-10-15 01:55:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 3135. [2019-10-15 01:55:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3135 states. [2019-10-15 01:55:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 4511 transitions. [2019-10-15 01:55:21,896 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 4511 transitions. Word has length 32 [2019-10-15 01:55:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:21,897 INFO L462 AbstractCegarLoop]: Abstraction has 3135 states and 4511 transitions. [2019-10-15 01:55:21,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 4511 transitions. [2019-10-15 01:55:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 01:55:21,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:21,899 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:21,899 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:21,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1707491326, now seen corresponding path program 1 times [2019-10-15 01:55:21,902 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:21,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140587414] [2019-10-15 01:55:21,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:21,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:21,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:22,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140587414] [2019-10-15 01:55:22,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083548825] [2019-10-15 01:55:22,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:22,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:55:22,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:55:22,216 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:22,282 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:55:22,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:55:22,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703334300] [2019-10-15 01:55:22,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:22,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:22,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:22,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:55:22,284 INFO L87 Difference]: Start difference. First operand 3135 states and 4511 transitions. Second operand 5 states.