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/array-examples/standard_maxInArray_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:25,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:25,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:25,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:34:25,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:25,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:25,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:25,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:25,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:25,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:25,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:25,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:25,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:25,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:25,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:25,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:25,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:25,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:25,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:25,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:25,836 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 01:34:25,853 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:25,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:25,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:25,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:25,857 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:25,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:25,858 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:25,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:25,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:25,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:25,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:25,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:25,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:25,859 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:25,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:25,860 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:25,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:25,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:25,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:25,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:25,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:25,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:25,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:25,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:25,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:25,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:25,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:25,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:25,864 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 01:34:26,150 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:26,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:26,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:26,170 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:26,170 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:26,171 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2019-10-15 01:34:26,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918dba128/a71be1bc1f174ba1973585af77e689e6/FLAG213950d38 [2019-10-15 01:34:26,700 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:26,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_maxInArray_ground.i [2019-10-15 01:34:26,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918dba128/a71be1bc1f174ba1973585af77e689e6/FLAG213950d38 [2019-10-15 01:34:27,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/918dba128/a71be1bc1f174ba1973585af77e689e6 [2019-10-15 01:34:27,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:27,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:27,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:27,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:27,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:27,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:27" (1/1) ... [2019-10-15 01:34:27,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37409b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27, skipping insertion in model container [2019-10-15 01:34:27,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:27" (1/1) ... [2019-10-15 01:34:27,075 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:27,095 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:27,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:27,333 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:27,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:27,370 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:27,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27 WrapperNode [2019-10-15 01:34:27,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:27,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:27,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:27,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:27,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27" (1/1) ... [2019-10-15 01:34:27,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27" (1/1) ... [2019-10-15 01:34:27,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27" (1/1) ... [2019-10-15 01:34:27,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27" (1/1) ... [2019-10-15 01:34:27,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27" (1/1) ... [2019-10-15 01:34:27,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27" (1/1) ... [2019-10-15 01:34:27,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27" (1/1) ... [2019-10-15 01:34:27,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:27,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:27,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:27,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:27,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27" (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 01:34:27,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:27,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:27,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:27,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:34:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:27,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:27,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:27,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:27,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:27,956 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:27,956 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:34:27,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:27 BoogieIcfgContainer [2019-10-15 01:34:27,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:27,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:27,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:27,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:27,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:27" (1/3) ... [2019-10-15 01:34:27,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d4ed57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:27, skipping insertion in model container [2019-10-15 01:34:27,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:27" (2/3) ... [2019-10-15 01:34:27,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d4ed57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:27, skipping insertion in model container [2019-10-15 01:34:27,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:27" (3/3) ... [2019-10-15 01:34:27,967 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2019-10-15 01:34:27,977 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:27,985 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:27,997 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:28,023 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:28,023 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:28,023 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:28,024 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:28,024 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:28,024 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:28,024 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:28,024 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:34:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:34:28,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:28,047 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:28,049 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash -493369724, now seen corresponding path program 1 times [2019-10-15 01:34:28,062 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:28,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222978960] [2019-10-15 01:34:28,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:28,254 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 01:34:28,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222978960] [2019-10-15 01:34:28,256 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:28,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:28,257 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754921349] [2019-10-15 01:34:28,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:28,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:28,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:28,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:28,279 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:34:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:28,316 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:34:28,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:28,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:34:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:28,329 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:34:28,329 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:34:28,335 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:34:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:34:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:34:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:34:28,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:34:28,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:28,372 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:34:28,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:34:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:34:28,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:28,374 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:28,375 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:28,375 INFO L82 PathProgramCache]: Analyzing trace with hash 937030386, now seen corresponding path program 1 times [2019-10-15 01:34:28,376 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:28,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400950596] [2019-10-15 01:34:28,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:28,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400950596] [2019-10-15 01:34:28,442 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:28,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:28,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978787814] [2019-10-15 01:34:28,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:28,444 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:28,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:28,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:28,445 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:34:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:28,456 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-10-15 01:34:28,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:28,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:34:28,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:28,459 INFO L225 Difference]: With dead ends: 27 [2019-10-15 01:34:28,459 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:34:28,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:34:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:34:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:34:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:34:28,466 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:34:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:28,466 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:34:28,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:34:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:34:28,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:28,468 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:28,468 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:28,468 INFO L82 PathProgramCache]: Analyzing trace with hash 76469094, now seen corresponding path program 1 times [2019-10-15 01:34:28,469 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:28,469 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233424559] [2019-10-15 01:34:28,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:28,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233424559] [2019-10-15 01:34:28,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766870692] [2019-10-15 01:34:28,535 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 01:34:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:28,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:28,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:28,641 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:28,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816035605] [2019-10-15 01:34:28,713 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:28,713 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:28,720 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:28,729 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:28,729 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:28,906 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:29,174 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:29,224 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:29,231 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:29,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:29,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:34:29,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233719401] [2019-10-15 01:34:29,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:29,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:29,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:29,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:29,628 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 17 states. [2019-10-15 01:34:30,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:30,181 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-10-15 01:34:30,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:30,182 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 01:34:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:30,185 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:34:30,190 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:34:30,192 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:34:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-10-15 01:34:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:34:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-15 01:34:30,212 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2019-10-15 01:34:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:30,213 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-15 01:34:30,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-15 01:34:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:34:30,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:30,214 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:30,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:30,418 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:30,418 INFO L82 PathProgramCache]: Analyzing trace with hash 134362772, now seen corresponding path program 2 times [2019-10-15 01:34:30,419 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:30,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825905087] [2019-10-15 01:34:30,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:30,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:30,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:34:30,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825905087] [2019-10-15 01:34:30,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214309676] [2019-10-15 01:34:30,539 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 01:34:30,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:34:30,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:30,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:30,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:30,607 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:30,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451019243] [2019-10-15 01:34:30,671 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:30,671 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:30,671 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:30,672 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:30,672 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:30,724 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:30,901 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:30,929 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:30,941 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:31,276 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:31,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 01:34:31,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338178608] [2019-10-15 01:34:31,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-15 01:34:31,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:31,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-15 01:34:31,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2019-10-15 01:34:31,280 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 21 states. [2019-10-15 01:34:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:31,955 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-10-15 01:34:31,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:34:31,956 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 17 [2019-10-15 01:34:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:31,958 INFO L225 Difference]: With dead ends: 39 [2019-10-15 01:34:31,958 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:34:31,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2019-10-15 01:34:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:34:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-10-15 01:34:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:34:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-15 01:34:31,967 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2019-10-15 01:34:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:31,967 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-15 01:34:31,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-15 01:34:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-15 01:34:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:34:31,968 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:31,969 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:32,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:32,173 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:32,174 INFO L82 PathProgramCache]: Analyzing trace with hash 717812850, now seen corresponding path program 3 times [2019-10-15 01:34:32,174 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:32,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768295145] [2019-10-15 01:34:32,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:32,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:32,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:32,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768295145] [2019-10-15 01:34:32,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997969301] [2019-10-15 01:34:32,267 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:32,339 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:32,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:32,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:34:32,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:32,362 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:32,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1967764546] [2019-10-15 01:34:32,469 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:32,469 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:32,470 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:32,470 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:32,471 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:32,512 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:32,666 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:32,687 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:32,692 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:33,013 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:33,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:34:33,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676737995] [2019-10-15 01:34:33,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:34:33,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:33,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:34:33,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:34:33,016 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 25 states. [2019-10-15 01:34:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:33,788 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2019-10-15 01:34:33,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-15 01:34:33,789 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 21 [2019-10-15 01:34:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:33,791 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:34:33,791 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 01:34:33,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 01:34:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 01:34:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2019-10-15 01:34:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:34:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-15 01:34:33,804 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2019-10-15 01:34:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:33,805 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-15 01:34:33,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:34:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-15 01:34:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:34:33,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:33,806 INFO L380 BasicCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:34,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:34,010 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1375752956, now seen corresponding path program 4 times [2019-10-15 01:34:34,011 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:34,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960585241] [2019-10-15 01:34:34,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:34,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:34,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:34,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960585241] [2019-10-15 01:34:34,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115433447] [2019-10-15 01:34:34,204 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:34,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:34:34,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:34,322 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:34,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893878310] [2019-10-15 01:34:34,633 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:34,633 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:34,633 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:34,634 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:34,634 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:34,664 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:34,777 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:34,795 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:34,803 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:35,149 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:35,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 01:34:35,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819016918] [2019-10-15 01:34:35,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-15 01:34:35,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:35,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-15 01:34:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1047, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:34:35,152 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 39 states. [2019-10-15 01:34:36,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:36,453 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2019-10-15 01:34:36,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-15 01:34:36,456 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 28 [2019-10-15 01:34:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:36,457 INFO L225 Difference]: With dead ends: 63 [2019-10-15 01:34:36,457 INFO L226 Difference]: Without dead ends: 49 [2019-10-15 01:34:36,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1244, Invalid=3868, Unknown=0, NotChecked=0, Total=5112 [2019-10-15 01:34:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-15 01:34:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-10-15 01:34:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-15 01:34:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-10-15 01:34:36,469 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 28 [2019-10-15 01:34:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:36,469 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-10-15 01:34:36,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-15 01:34:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-10-15 01:34:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:34:36,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:36,471 INFO L380 BasicCegarLoop]: trace histogram [26, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:36,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:36,685 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:36,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:36,685 INFO L82 PathProgramCache]: Analyzing trace with hash -118694588, now seen corresponding path program 5 times [2019-10-15 01:34:36,686 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:36,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955538479] [2019-10-15 01:34:36,686 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:36,686 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:36,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:37,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955538479] [2019-10-15 01:34:37,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887525698] [2019-10-15 01:34:37,121 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:37,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:37,195 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:37,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:37,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:34:37,293 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:34:37,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342009735] [2019-10-15 01:34:37,408 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:37,409 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:37,409 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:37,409 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:37,410 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:37,434 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:37,525 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:37,541 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:37,546 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:37,956 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:37,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7, 7, 11] total 49 [2019-10-15 01:34:37,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728949130] [2019-10-15 01:34:37,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-15 01:34:37,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:37,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-15 01:34:37,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1852, Unknown=0, NotChecked=0, Total=2352 [2019-10-15 01:34:37,961 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 49 states. [2019-10-15 01:34:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:40,292 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2019-10-15 01:34:40,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:34:40,293 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 42 [2019-10-15 01:34:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:40,295 INFO L225 Difference]: With dead ends: 70 [2019-10-15 01:34:40,295 INFO L226 Difference]: Without dead ends: 56 [2019-10-15 01:34:40,298 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1514, Invalid=7042, Unknown=0, NotChecked=0, Total=8556 [2019-10-15 01:34:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-15 01:34:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-10-15 01:34:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-15 01:34:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-10-15 01:34:40,308 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 42 [2019-10-15 01:34:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:40,308 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-10-15 01:34:40,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-15 01:34:40,309 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-10-15 01:34:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 01:34:40,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:40,310 INFO L380 BasicCegarLoop]: trace histogram [27, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:40,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:40,514 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:40,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:40,514 INFO L82 PathProgramCache]: Analyzing trace with hash 426553522, now seen corresponding path program 6 times [2019-10-15 01:34:40,515 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:40,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110573980] [2019-10-15 01:34:40,515 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:40,515 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:40,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:40,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110573980] [2019-10-15 01:34:40,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46305238] [2019-10-15 01:34:40,956 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:41,076 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:41,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:41,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 01:34:41,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:41,103 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:42,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221661851] [2019-10-15 01:34:42,041 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:42,041 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:42,042 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:42,042 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:42,042 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:42,078 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:42,152 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:42,166 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:42,173 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:42,544 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:42,544 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 01:34:42,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990192161] [2019-10-15 01:34:42,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-10-15 01:34:42,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:42,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-10-15 01:34:42,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=2952, Unknown=0, NotChecked=0, Total=4692 [2019-10-15 01:34:42,548 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 69 states. [2019-10-15 01:34:45,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:45,634 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2019-10-15 01:34:45,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-10-15 01:34:45,635 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 49 [2019-10-15 01:34:45,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:45,637 INFO L225 Difference]: With dead ends: 105 [2019-10-15 01:34:45,637 INFO L226 Difference]: Without dead ends: 85 [2019-10-15 01:34:45,642 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5099, Invalid=12193, Unknown=0, NotChecked=0, Total=17292 [2019-10-15 01:34:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-15 01:34:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2019-10-15 01:34:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-15 01:34:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2019-10-15 01:34:45,654 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 49 [2019-10-15 01:34:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:45,655 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2019-10-15 01:34:45,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-10-15 01:34:45,655 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2019-10-15 01:34:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-15 01:34:45,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:45,658 INFO L380 BasicCegarLoop]: trace histogram [56, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:45,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:45,862 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:45,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:45,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1211031940, now seen corresponding path program 7 times [2019-10-15 01:34:45,863 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:45,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478433636] [2019-10-15 01:34:45,863 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:45,863 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:45,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:47,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478433636] [2019-10-15 01:34:47,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766464943] [2019-10-15 01:34:47,187 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:47,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 01:34:47,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:47,396 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:34:50,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700447637] [2019-10-15 01:34:50,908 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:34:50,909 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:50,909 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:50,909 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:50,909 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:50,932 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:51,009 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:34:51,023 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:51,026 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:51,574 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:51,575 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59, 11] total 127 [2019-10-15 01:34:51,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072665034] [2019-10-15 01:34:51,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-10-15 01:34:51,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:51,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-10-15 01:34:51,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6815, Invalid=9187, Unknown=0, NotChecked=0, Total=16002 [2019-10-15 01:34:51,582 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 127 states. [2019-10-15 01:35:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:00,665 INFO L93 Difference]: Finished difference Result 163 states and 225 transitions. [2019-10-15 01:35:00,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2019-10-15 01:35:00,666 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 78 [2019-10-15 01:35:00,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:00,667 INFO L225 Difference]: With dead ends: 163 [2019-10-15 01:35:00,667 INFO L226 Difference]: Without dead ends: 143 [2019-10-15 01:35:00,672 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11724 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=20208, Invalid=41048, Unknown=0, NotChecked=0, Total=61256 [2019-10-15 01:35:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-10-15 01:35:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2019-10-15 01:35:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-10-15 01:35:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2019-10-15 01:35:00,690 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 78 [2019-10-15 01:35:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:00,690 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2019-10-15 01:35:00,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 127 states. [2019-10-15 01:35:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2019-10-15 01:35:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 01:35:00,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:00,694 INFO L380 BasicCegarLoop]: trace histogram [114, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:00,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:00,896 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:00,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2051514436, now seen corresponding path program 8 times [2019-10-15 01:35:00,898 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:00,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74269916] [2019-10-15 01:35:00,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:00,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:00,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:05,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74269916] [2019-10-15 01:35:05,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067637411] [2019-10-15 01:35:05,724 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:05,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-15 01:35:05,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:05,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:35:05,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2019-10-15 01:35:06,442 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2019-10-15 01:35:07,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857279377] [2019-10-15 01:35:07,029 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:35:07,029 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:07,029 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:07,029 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:07,030 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:07,052 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:07,124 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:35:07,132 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:07,135 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:07,999 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:07,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 13, 13, 11] total 149 [2019-10-15 01:35:08,000 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836434546] [2019-10-15 01:35:08,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 149 states [2019-10-15 01:35:08,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:08,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2019-10-15 01:35:08,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7090, Invalid=14962, Unknown=0, NotChecked=0, Total=22052 [2019-10-15 01:35:08,004 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 149 states.