/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_password_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:26:15,295 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:26:15,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:26:15,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:26:15,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:26:15,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:26:15,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:26:15,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:26:15,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:26:15,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:26:15,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:26:15,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:26:15,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:26:15,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:26:15,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:26:15,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:26:15,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:26:15,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:26:15,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:26:15,413 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:26:15,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:26:15,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:26:15,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:26:15,417 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:26:15,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:26:15,417 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:26:15,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:26:15,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:26:15,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:26:15,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:26:15,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:26:15,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:26:15,421 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:26:15,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:26:15,422 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:26:15,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:26:15,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:26:15,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:26:15,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:26:15,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:26:15,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:26:15,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:26:15,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:26:15,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:26:15,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:26:15,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:26:15,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:26:15,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:26:15,733 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:26:15,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:26:15,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:26:15,762 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:26:15,762 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:26:15,763 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-11-07 01:26:15,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1cfd95fb/8b74c8820ec141b59572f36175011987/FLAG6a7a876b4 [2019-11-07 01:26:16,262 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:26:16,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-11-07 01:26:16,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1cfd95fb/8b74c8820ec141b59572f36175011987/FLAG6a7a876b4 [2019-11-07 01:26:16,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1cfd95fb/8b74c8820ec141b59572f36175011987 [2019-11-07 01:26:16,701 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:26:16,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:26:16,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:26:16,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:26:16,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:26:16,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:26:16" (1/1) ... [2019-11-07 01:26:16,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d184af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:16, skipping insertion in model container [2019-11-07 01:26:16,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:26:16" (1/1) ... [2019-11-07 01:26:16,748 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:26:16,796 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:26:17,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:26:17,070 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:26:17,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:26:17,107 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:26:17,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17 WrapperNode [2019-11-07 01:26:17,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:26:17,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:26:17,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:26:17,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:26:17,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17" (1/1) ... [2019-11-07 01:26:17,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17" (1/1) ... [2019-11-07 01:26:17,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17" (1/1) ... [2019-11-07 01:26:17,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17" (1/1) ... [2019-11-07 01:26:17,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17" (1/1) ... [2019-11-07 01:26:17,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17" (1/1) ... [2019-11-07 01:26:17,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17" (1/1) ... [2019-11-07 01:26:17,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:26:17,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:26:17,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:26:17,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:26:17,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:26:17,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:26:17,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:26:17,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:26:17,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:26:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:26:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:26:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:26:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:26:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:26:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:26:17,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:26:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:26:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:26:17,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:26:17,688 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:26:17,689 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:26:17,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:17 BoogieIcfgContainer [2019-11-07 01:26:17,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:26:17,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:26:17,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:26:17,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:26:17,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:26:16" (1/3) ... [2019-11-07 01:26:17,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25573c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:17, skipping insertion in model container [2019-11-07 01:26:17,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:17" (2/3) ... [2019-11-07 01:26:17,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25573c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:17, skipping insertion in model container [2019-11-07 01:26:17,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:17" (3/3) ... [2019-11-07 01:26:17,698 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2019-11-07 01:26:17,708 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:26:17,716 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:26:17,728 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:26:17,752 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:26:17,753 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:26:17,753 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:26:17,753 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:26:17,753 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:26:17,754 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:26:17,754 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:26:17,754 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:26:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-07 01:26:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:26:17,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:26:17,775 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:26:17,777 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:26:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:26:17,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1967025528, now seen corresponding path program 1 times [2019-11-07 01:26:17,790 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:26:17,790 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116939911] [2019-11-07 01:26:17,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:26:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:26:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:26:17,954 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116939911] [2019-11-07 01:26:17,955 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:26:17,956 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:26:17,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254383514] [2019-11-07 01:26:17,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:26:17,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:26:17,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:26:17,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:26:17,984 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-07 01:26:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:26:18,048 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-11-07 01:26:18,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:26:18,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:26:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:26:18,060 INFO L225 Difference]: With dead ends: 38 [2019-11-07 01:26:18,061 INFO L226 Difference]: Without dead ends: 19 [2019-11-07 01:26:18,067 INFO L630 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 [2019-11-07 01:26:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-07 01:26:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-07 01:26:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-07 01:26:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-07 01:26:18,116 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2019-11-07 01:26:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:26:18,117 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-07 01:26:18,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:26:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-07 01:26:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 01:26:18,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:26:18,119 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:26:18,120 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:26:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:26:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1900792287, now seen corresponding path program 1 times [2019-11-07 01:26:18,121 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:26:18,121 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131535018] [2019-11-07 01:26:18,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:26:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:26:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:26:18,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131535018] [2019-11-07 01:26:18,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001170566] [2019-11-07 01:26:18,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:26:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:26:18,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:26:18,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:26:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:26:18,389 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:26:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:26:18,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987139484] [2019-11-07 01:26:18,460 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:26:18,460 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:26:18,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:26:18,476 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:26:18,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:26:18,631 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:26:18,932 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:26:18,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:26:18,951 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:26:19,310 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:26:19,310 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 18 [2019-11-07 01:26:19,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21678249] [2019-11-07 01:26:19,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:26:19,314 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:26:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:26:19,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:26:19,315 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 18 states. [2019-11-07 01:26:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:26:19,972 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-07 01:26:19,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-07 01:26:19,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-11-07 01:26:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:26:19,975 INFO L225 Difference]: With dead ends: 46 [2019-11-07 01:26:19,975 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:26:19,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2019-11-07 01:26:19,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:26:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-11-07 01:26:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 01:26:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-07 01:26:19,995 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2019-11-07 01:26:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:26:19,995 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-07 01:26:19,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:26:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-07 01:26:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:26:20,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:26:20,001 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:26:20,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:26:20,202 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:26:20,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:26:20,203 INFO L82 PathProgramCache]: Analyzing trace with hash -365657160, now seen corresponding path program 2 times [2019-11-07 01:26:20,203 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:26:20,204 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087112650] [2019-11-07 01:26:20,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:26:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:26:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:26:20,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087112650] [2019-11-07 01:26:20,341 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50860443] [2019-11-07 01:26:20,341 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 [2019-11-07 01:26:20,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:26:20,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:26:20,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:26:20,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:26:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:26:20,447 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:26:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:26:20,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904070780] [2019-11-07 01:26:20,515 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:26:20,515 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:26:20,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:26:20,516 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:26:20,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:26:20,551 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:26:20,718 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:26:20,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:26:20,731 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:26:21,013 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:26:21,013 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 12] total 24 [2019-11-07 01:26:21,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099967860] [2019-11-07 01:26:21,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-07 01:26:21,015 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:26:21,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-07 01:26:21,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2019-11-07 01:26:21,016 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 24 states. [2019-11-07 01:26:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:26:21,824 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2019-11-07 01:26:21,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-07 01:26:21,825 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2019-11-07 01:26:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:26:21,827 INFO L225 Difference]: With dead ends: 61 [2019-11-07 01:26:21,828 INFO L226 Difference]: Without dead ends: 46 [2019-11-07 01:26:21,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=328, Invalid=1394, Unknown=0, NotChecked=0, Total=1722 [2019-11-07 01:26:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-07 01:26:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-11-07 01:26:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-07 01:26:21,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-07 01:26:21,839 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 21 [2019-11-07 01:26:21,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:26:21,839 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-07 01:26:21,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-07 01:26:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-07 01:26:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-07 01:26:21,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:26:21,841 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:26:22,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:26:22,044 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:26:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:26:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1691275544, now seen corresponding path program 3 times [2019-11-07 01:26:22,045 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:26:22,045 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370579232] [2019-11-07 01:26:22,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:26:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:26:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:26:22,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370579232] [2019-11-07 01:26:22,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943323715] [2019-11-07 01:26:22,251 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 [2019-11-07 01:26:22,326 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:26:22,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:26:22,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:26:22,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:26:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:26:22,348 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:26:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:26:22,575 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497920464] [2019-11-07 01:26:22,577 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:26:22,577 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:26:22,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:26:22,578 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:26:22,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:26:22,603 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:26:22,717 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:26:22,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:26:22,730 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:26:23,035 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:26:23,035 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 12] total 36 [2019-11-07 01:26:23,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388435494] [2019-11-07 01:26:23,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-07 01:26:23,036 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:26:23,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-07 01:26:23,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=925, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 01:26:23,038 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 36 states. [2019-11-07 01:26:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:26:24,487 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2019-11-07 01:26:24,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-07 01:26:24,488 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 33 [2019-11-07 01:26:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:26:24,490 INFO L225 Difference]: With dead ends: 91 [2019-11-07 01:26:24,490 INFO L226 Difference]: Without dead ends: 70 [2019-11-07 01:26:24,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=994, Invalid=3296, Unknown=0, NotChecked=0, Total=4290 [2019-11-07 01:26:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-07 01:26:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2019-11-07 01:26:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-07 01:26:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2019-11-07 01:26:24,505 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 33 [2019-11-07 01:26:24,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:26:24,506 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2019-11-07 01:26:24,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-07 01:26:24,506 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2019-11-07 01:26:24,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-07 01:26:24,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:26:24,508 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:26:24,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:26:24,711 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:26:24,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:26:24,713 INFO L82 PathProgramCache]: Analyzing trace with hash 24224728, now seen corresponding path program 4 times [2019-11-07 01:26:24,713 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:26:24,714 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463600633] [2019-11-07 01:26:24,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:26:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:26:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:26:25,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463600633] [2019-11-07 01:26:25,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770982237] [2019-11-07 01:26:25,356 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 [2019-11-07 01:26:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:26:25,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:26:25,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:26:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:26:25,515 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:26:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:26:26,270 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714062559] [2019-11-07 01:26:26,271 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:26:26,271 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:26:26,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:26:26,272 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:26:26,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:26:26,293 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:26:26,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:26:26,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:26:26,416 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:26:26,817 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:26:26,818 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 12] total 60 [2019-11-07 01:26:26,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462863426] [2019-11-07 01:26:26,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-11-07 01:26:26,820 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:26:26,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-11-07 01:26:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=2329, Unknown=0, NotChecked=0, Total=3540 [2019-11-07 01:26:26,822 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 60 states. [2019-11-07 01:26:30,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:26:30,131 INFO L93 Difference]: Finished difference Result 151 states and 202 transitions. [2019-11-07 01:26:30,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-07 01:26:30,131 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 57 [2019-11-07 01:26:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:26:30,133 INFO L225 Difference]: With dead ends: 151 [2019-11-07 01:26:30,133 INFO L226 Difference]: Without dead ends: 118 [2019-11-07 01:26:30,138 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3622, Invalid=9260, Unknown=0, NotChecked=0, Total=12882 [2019-11-07 01:26:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-07 01:26:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2019-11-07 01:26:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-07 01:26:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2019-11-07 01:26:30,169 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 57 [2019-11-07 01:26:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:26:30,170 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2019-11-07 01:26:30,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-11-07 01:26:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2019-11-07 01:26:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-07 01:26:30,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:26:30,174 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:26:30,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:26:30,375 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:26:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:26:30,376 INFO L82 PathProgramCache]: Analyzing trace with hash 227027288, now seen corresponding path program 5 times [2019-11-07 01:26:30,376 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:26:30,378 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936153272] [2019-11-07 01:26:30,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:26:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:26:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-07 01:26:31,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936153272] [2019-11-07 01:26:31,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291658481] [2019-11-07 01:26:31,549 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