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_password_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:53,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:53,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:53,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:34:53,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:53,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:53,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:53,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:53,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:53,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:53,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:53,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:53,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:53,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:53,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:53,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:53,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:53,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:53,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:53,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:53,732 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 01:34:53,759 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:53,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:53,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:53,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:53,762 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:53,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:53,763 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:53,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:53,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:53,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:53,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:53,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:53,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:53,764 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:53,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:53,764 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:53,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:53,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:53,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:53,765 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:53,765 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:53,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:53,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:53,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:53,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:53,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:53,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:53,767 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:53,767 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 01:34:54,056 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:54,070 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:54,073 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:54,074 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:54,074 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:54,075 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-10-15 01:34:54,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3bd6587/4021cb987e0646f9921bd53dc97525d4/FLAG4c33c2890 [2019-10-15 01:34:54,584 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:54,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-10-15 01:34:54,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3bd6587/4021cb987e0646f9921bd53dc97525d4/FLAG4c33c2890 [2019-10-15 01:34:54,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3bd6587/4021cb987e0646f9921bd53dc97525d4 [2019-10-15 01:34:54,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:54,970 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:54,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:54,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:54,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:54,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bc947f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:54, skipping insertion in model container [2019-10-15 01:34:54,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:54" (1/1) ... [2019-10-15 01:34:54,987 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:55,005 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:55,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:55,199 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:55,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:55,245 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:55,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55 WrapperNode [2019-10-15 01:34:55,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:55,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:55,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:55,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:55,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (1/1) ... [2019-10-15 01:34:55,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:55,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:55,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:55,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:55,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (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 01:34:55,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:55,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:55,414 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:55,414 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:34:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:55,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:55,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:55,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:55,815 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:55,815 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:34:55,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:55 BoogieIcfgContainer [2019-10-15 01:34:55,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:55,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:55,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:55,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:55,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:54" (1/3) ... [2019-10-15 01:34:55,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fdcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:55, skipping insertion in model container [2019-10-15 01:34:55,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:55" (2/3) ... [2019-10-15 01:34:55,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fdcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:55, skipping insertion in model container [2019-10-15 01:34:55,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:55" (3/3) ... [2019-10-15 01:34:55,823 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2019-10-15 01:34:55,831 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:55,838 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:55,848 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:55,870 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:55,870 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:55,870 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:55,870 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:55,871 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:55,871 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:55,871 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:55,871 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:34:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:34:55,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:55,892 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:55,894 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:55,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1967025528, now seen corresponding path program 1 times [2019-10-15 01:34:55,906 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:55,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196269313] [2019-10-15 01:34:55,906 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,906 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:55,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,063 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 01:34:56,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196269313] [2019-10-15 01:34:56,065 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:56,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:56,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104233388] [2019-10-15 01:34:56,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:56,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:56,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:56,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:56,090 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-15 01:34:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:56,143 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-10-15 01:34:56,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:56,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:34:56,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:56,154 INFO L225 Difference]: With dead ends: 38 [2019-10-15 01:34:56,154 INFO L226 Difference]: Without dead ends: 19 [2019-10-15 01:34:56,158 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 01:34:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-15 01:34:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-15 01:34:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:34:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-15 01:34:56,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2019-10-15 01:34:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:56,202 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-15 01:34:56,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-15 01:34:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:34:56,203 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:56,204 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:56,204 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:56,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:56,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1900792287, now seen corresponding path program 1 times [2019-10-15 01:34:56,205 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:56,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109838234] [2019-10-15 01:34:56,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:56,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:56,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,280 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 01:34:56,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109838234] [2019-10-15 01:34:56,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253865969] [2019-10-15 01:34:56,281 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 01:34:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:56,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:56,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:56,409 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 01:34:56,409 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:56,440 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 01:34:56,441 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976533080] [2019-10-15 01:34:56,468 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:34:56,469 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:56,476 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:56,485 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:56,486 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:56,650 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:57,109 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:34:57,124 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:57,131 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:57,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:57,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 18 [2019-10-15 01:34:57,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105599267] [2019-10-15 01:34:57,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:34:57,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:57,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:34:57,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:34:57,568 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 18 states. [2019-10-15 01:34:58,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:58,218 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-10-15 01:34:58,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 01:34:58,219 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-10-15 01:34:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:58,220 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:34:58,220 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:34:58,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2019-10-15 01:34:58,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:34:58,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-10-15 01:34:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:34:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-15 01:34:58,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2019-10-15 01:34:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:58,243 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-15 01:34:58,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:34:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-15 01:34:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:34:58,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:58,245 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:58,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:58,458 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:58,458 INFO L82 PathProgramCache]: Analyzing trace with hash -365657160, now seen corresponding path program 2 times [2019-10-15 01:34:58,458 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:58,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281599650] [2019-10-15 01:34:58,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:58,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:58,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:58,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281599650] [2019-10-15 01:34:58,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196909222] [2019-10-15 01:34:58,620 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 01:34:58,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:58,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:58,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:58,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:58,691 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:34:58,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516283689] [2019-10-15 01:34:58,762 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:34:58,762 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:58,763 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:58,763 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:58,764 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:58,817 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:59,023 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:34:59,034 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:59,040 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:59,365 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:59,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 12] total 24 [2019-10-15 01:34:59,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950661715] [2019-10-15 01:34:59,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:34:59,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:59,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:34:59,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:34:59,368 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 24 states. [2019-10-15 01:35:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:00,188 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2019-10-15 01:35:00,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:35:00,189 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2019-10-15 01:35:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:00,191 INFO L225 Difference]: With dead ends: 61 [2019-10-15 01:35:00,191 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:35:00,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=1394, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 01:35:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:35:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-10-15 01:35:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:35:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-10-15 01:35:00,202 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 21 [2019-10-15 01:35:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:00,203 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-10-15 01:35:00,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:35:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-10-15 01:35:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:35:00,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:00,204 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:00,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:00,416 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:00,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1691275544, now seen corresponding path program 3 times [2019-10-15 01:35:00,417 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:00,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143116287] [2019-10-15 01:35:00,418 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:00,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:00,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:00,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143116287] [2019-10-15 01:35:00,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975395272] [2019-10-15 01:35:00,641 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 01:35:00,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:00,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:00,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:35:00,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:00,774 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:35:00,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065342203] [2019-10-15 01:35:00,978 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:00,979 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:00,979 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:00,980 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:00,980 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:01,011 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:01,148 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:01,157 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:01,162 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:01,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:01,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 12] total 36 [2019-10-15 01:35:01,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494989548] [2019-10-15 01:35:01,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-15 01:35:01,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:01,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-15 01:35:01,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=925, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:35:01,546 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 36 states. [2019-10-15 01:35:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:02,996 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2019-10-15 01:35:02,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-15 01:35:02,997 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 33 [2019-10-15 01:35:02,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:02,999 INFO L225 Difference]: With dead ends: 91 [2019-10-15 01:35:02,999 INFO L226 Difference]: Without dead ends: 70 [2019-10-15 01:35:03,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=994, Invalid=3296, Unknown=0, NotChecked=0, Total=4290 [2019-10-15 01:35:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-15 01:35:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2019-10-15 01:35:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:35:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2019-10-15 01:35:03,020 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 33 [2019-10-15 01:35:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:03,020 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2019-10-15 01:35:03,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-15 01:35:03,021 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2019-10-15 01:35:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:35:03,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:03,029 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:03,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:03,233 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash 24224728, now seen corresponding path program 4 times [2019-10-15 01:35:03,234 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:03,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005079396] [2019-10-15 01:35:03,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:03,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:03,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:03,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005079396] [2019-10-15 01:35:03,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40377611] [2019-10-15 01:35:03,792 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 01:35:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:03,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:35:03,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:03,991 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:35:04,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2076763895] [2019-10-15 01:35:04,719 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 01:35:04,719 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:04,719 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:04,720 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:04,720 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:04,747 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:04,907 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:35:04,918 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:04,922 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:05,388 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:05,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 12] total 60 [2019-10-15 01:35:05,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499315209] [2019-10-15 01:35:05,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-10-15 01:35:05,393 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:05,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-10-15 01:35:05,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=2329, Unknown=0, NotChecked=0, Total=3540 [2019-10-15 01:35:05,397 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 60 states. [2019-10-15 01:35:08,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:08,564 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2019-10-15 01:35:08,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-15 01:35:08,569 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 57 [2019-10-15 01:35:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:08,571 INFO L225 Difference]: With dead ends: 151 [2019-10-15 01:35:08,571 INFO L226 Difference]: Without dead ends: 118 [2019-10-15 01:35:08,577 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3622, Invalid=9260, Unknown=0, NotChecked=0, Total=12882 [2019-10-15 01:35:08,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-15 01:35:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2019-10-15 01:35:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-15 01:35:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2019-10-15 01:35:08,610 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 57 [2019-10-15 01:35:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:08,611 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2019-10-15 01:35:08,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-10-15 01:35:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2019-10-15 01:35:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:35:08,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:08,617 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:08,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:08,818 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash 227027288, now seen corresponding path program 5 times [2019-10-15 01:35:08,819 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:08,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702316889] [2019-10-15 01:35:08,820 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:08,821 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:08,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:35:10,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702316889] [2019-10-15 01:35:10,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751436638] [2019-10-15 01:35:10,039 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