/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_2.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:03:22,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:03:22,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:03:22,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 06:03:22,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 06:03:22,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 06:03:22,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 06:03:22,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 06:03:22,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 06:03:22,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 06:03:22,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 06:03:22,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 06:03:22,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 06:03:22,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 06:03:22,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 06:03:22,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 06:03:22,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 06:03:22,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:03:22,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:03:22,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:03:22,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 06:03:22,587 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:03:22,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:03:22,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:03:22,588 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:03:22,588 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:03:22,589 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:03:22,589 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:03:22,589 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:03:22,589 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:03:22,589 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:03:22,590 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:03:22,590 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:03:22,590 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:03:22,590 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:03:22,590 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:03:22,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:03:22,591 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:03:22,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:03:22,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:03:22,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:03:22,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:03:22,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:03:22,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:03:22,593 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:03:22,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:03:22,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:03:22,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:03:22,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:03:22,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:03:22,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:03:22,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:03:22,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:03:22,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:03:22,595 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:03:22,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:03:22,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:03:22,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:03:22,595 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:03:22,883 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:03:22,903 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:03:22,907 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:03:22,908 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:03:22,908 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:03:22,909 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_2.cil-1.c [2019-11-24 06:03:22,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e91296f05/fa74c602813f483b845c508ad2ec0dea/FLAG05caa18b8 [2019-11-24 06:03:23,440 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:03:23,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_2.cil-1.c [2019-11-24 06:03:23,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e91296f05/fa74c602813f483b845c508ad2ec0dea/FLAG05caa18b8 [2019-11-24 06:03:23,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e91296f05/fa74c602813f483b845c508ad2ec0dea [2019-11-24 06:03:23,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:03:23,816 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:03:23,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:03:23,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:03:23,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:03:23,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703808b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23, skipping insertion in model container [2019-11-24 06:03:23,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:03:23,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:03:24,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:03:24,176 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:03:24,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:03:24,339 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:03:24,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24 WrapperNode [2019-11-24 06:03:24,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:03:24,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:03:24,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:03:24,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:03:24,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (1/1) ... [2019-11-24 06:03:24,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (1/1) ... [2019-11-24 06:03:24,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:03:24,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:03:24,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:03:24,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:03:24,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (1/1) ... [2019-11-24 06:03:24,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (1/1) ... [2019-11-24 06:03:24,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (1/1) ... [2019-11-24 06:03:24,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (1/1) ... [2019-11-24 06:03:24,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (1/1) ... [2019-11-24 06:03:24,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (1/1) ... [2019-11-24 06:03:24,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (1/1) ... [2019-11-24 06:03:24,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:03:24,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:03:24,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:03:24,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:03:24,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (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 [2019-11-24 06:03:24,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:03:24,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:03:24,766 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-24 06:03:25,445 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2019-11-24 06:03:25,446 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2019-11-24 06:03:25,793 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:03:25,793 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 06:03:25,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:03:25 BoogieIcfgContainer [2019-11-24 06:03:25,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:03:25,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:03:25,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:03:25,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:03:25,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:03:23" (1/3) ... [2019-11-24 06:03:25,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ecd690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:03:25, skipping insertion in model container [2019-11-24 06:03:25,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:24" (2/3) ... [2019-11-24 06:03:25,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ecd690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:03:25, skipping insertion in model container [2019-11-24 06:03:25,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:03:25" (3/3) ... [2019-11-24 06:03:25,803 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_2.cil-1.c [2019-11-24 06:03:25,813 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:03:25,822 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:03:25,833 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:03:25,865 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:03:25,865 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:03:25,865 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:03:25,865 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:03:25,865 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:03:25,866 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:03:25,866 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:03:25,866 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:03:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states. [2019-11-24 06:03:25,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-24 06:03:25,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:25,889 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:25,889 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:25,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2083977910, now seen corresponding path program 1 times [2019-11-24 06:03:25,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:25,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778291024] [2019-11-24 06:03:25,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:26,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778291024] [2019-11-24 06:03:26,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:26,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:03:26,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969183839] [2019-11-24 06:03:26,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:26,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:26,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:26,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:26,126 INFO L87 Difference]: Start difference. First operand 106 states. Second operand 3 states. [2019-11-24 06:03:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:26,365 INFO L93 Difference]: Finished difference Result 231 states and 400 transitions. [2019-11-24 06:03:26,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:26,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-24 06:03:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:26,380 INFO L225 Difference]: With dead ends: 231 [2019-11-24 06:03:26,380 INFO L226 Difference]: Without dead ends: 121 [2019-11-24 06:03:26,384 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-24 06:03:26,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2019-11-24 06:03:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-24 06:03:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 174 transitions. [2019-11-24 06:03:26,447 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 174 transitions. Word has length 39 [2019-11-24 06:03:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:26,448 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 174 transitions. [2019-11-24 06:03:26,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 174 transitions. [2019-11-24 06:03:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-24 06:03:26,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:26,452 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:26,453 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1998750293, now seen corresponding path program 1 times [2019-11-24 06:03:26,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:26,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74721758] [2019-11-24 06:03:26,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:26,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74721758] [2019-11-24 06:03:26,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:26,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:26,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353437862] [2019-11-24 06:03:26,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:26,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:26,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:26,592 INFO L87 Difference]: Start difference. First operand 119 states and 174 transitions. Second operand 3 states. [2019-11-24 06:03:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:26,764 INFO L93 Difference]: Finished difference Result 257 states and 382 transitions. [2019-11-24 06:03:26,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:26,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2019-11-24 06:03:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:26,767 INFO L225 Difference]: With dead ends: 257 [2019-11-24 06:03:26,768 INFO L226 Difference]: Without dead ends: 140 [2019-11-24 06:03:26,770 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 [2019-11-24 06:03:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-24 06:03:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-11-24 06:03:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-24 06:03:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 196 transitions. [2019-11-24 06:03:26,800 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 196 transitions. Word has length 53 [2019-11-24 06:03:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:26,801 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 196 transitions. [2019-11-24 06:03:26,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 196 transitions. [2019-11-24 06:03:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-24 06:03:26,805 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:26,806 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:26,809 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1207665146, now seen corresponding path program 1 times [2019-11-24 06:03:26,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:26,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80473686] [2019-11-24 06:03:26,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 06:03:26,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80473686] [2019-11-24 06:03:26,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:26,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 06:03:26,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933958495] [2019-11-24 06:03:26,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 06:03:26,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 06:03:26,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:03:26,975 INFO L87 Difference]: Start difference. First operand 138 states and 196 transitions. Second operand 4 states. [2019-11-24 06:03:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:27,246 INFO L93 Difference]: Finished difference Result 319 states and 470 transitions. [2019-11-24 06:03:27,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 06:03:27,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-11-24 06:03:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:27,249 INFO L225 Difference]: With dead ends: 319 [2019-11-24 06:03:27,250 INFO L226 Difference]: Without dead ends: 183 [2019-11-24 06:03:27,251 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 06:03:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-24 06:03:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 176. [2019-11-24 06:03:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-24 06:03:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 238 transitions. [2019-11-24 06:03:27,267 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 238 transitions. Word has length 70 [2019-11-24 06:03:27,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:27,272 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 238 transitions. [2019-11-24 06:03:27,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 06:03:27,272 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 238 transitions. [2019-11-24 06:03:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-24 06:03:27,274 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:27,275 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:27,275 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash -460895293, now seen corresponding path program 1 times [2019-11-24 06:03:27,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:27,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056638819] [2019-11-24 06:03:27,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-24 06:03:27,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056638819] [2019-11-24 06:03:27,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:27,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:27,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453508781] [2019-11-24 06:03:27,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:27,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:27,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:27,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:27,403 INFO L87 Difference]: Start difference. First operand 176 states and 238 transitions. Second operand 3 states. [2019-11-24 06:03:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:27,539 INFO L93 Difference]: Finished difference Result 383 states and 532 transitions. [2019-11-24 06:03:27,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:27,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-11-24 06:03:27,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:27,542 INFO L225 Difference]: With dead ends: 383 [2019-11-24 06:03:27,543 INFO L226 Difference]: Without dead ends: 209 [2019-11-24 06:03:27,544 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 [2019-11-24 06:03:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-11-24 06:03:27,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2019-11-24 06:03:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-24 06:03:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 264 transitions. [2019-11-24 06:03:27,557 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 264 transitions. Word has length 90 [2019-11-24 06:03:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:27,558 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 264 transitions. [2019-11-24 06:03:27,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 264 transitions. [2019-11-24 06:03:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-24 06:03:27,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:27,560 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:27,560 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:27,561 INFO L82 PathProgramCache]: Analyzing trace with hash 601951521, now seen corresponding path program 1 times [2019-11-24 06:03:27,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:27,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287067652] [2019-11-24 06:03:27,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:27,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287067652] [2019-11-24 06:03:27,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008464904] [2019-11-24 06:03:27,697 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 [2019-11-24 06:03:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:27,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:03:27,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:03:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:27,862 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:03:27,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:27,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:27,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:27,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-24 06:03:27,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315809291] [2019-11-24 06:03:28,027 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2019-11-24 06:03:28,028 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:03:28,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:03:28,049 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:03:28,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:03:28,347 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-24 06:03:28,544 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2019-11-24 06:03:28,764 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2019-11-24 06:03:29,103 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 254 [2019-11-24 06:03:29,308 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 236 [2019-11-24 06:03:29,429 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 236 [2019-11-24 06:03:29,548 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 235 [2019-11-24 06:03:29,817 WARN L192 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 268 [2019-11-24 06:03:30,148 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 269 [2019-11-24 06:03:31,025 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 338 [2019-11-24 06:03:31,459 WARN L192 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 345 [2019-11-24 06:03:31,883 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 251 [2019-11-24 06:03:32,034 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 251 [2019-11-24 06:03:32,203 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2019-11-24 06:03:32,348 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 251 [2019-11-24 06:03:32,490 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 251 [2019-11-24 06:03:32,629 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2019-11-24 06:03:32,775 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 261 [2019-11-24 06:03:32,884 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 261 [2019-11-24 06:03:33,000 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 260 [2019-11-24 06:03:33,200 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 289 [2019-11-24 06:03:33,358 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 289 [2019-11-24 06:03:33,485 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-24 06:03:33,666 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 289 [2019-11-24 06:03:33,843 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 289 [2019-11-24 06:03:33,958 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-24 06:03:34,168 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:03:34,364 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:03:34,498 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:03:34,622 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:03:34,739 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:03:34,860 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2019-11-24 06:03:36,184 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2019-11-24 06:03:36,362 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 272 [2019-11-24 06:03:36,693 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-24 06:03:36,801 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-24 06:03:36,935 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-24 06:03:37,043 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-24 06:03:37,158 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-24 06:03:37,270 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-24 06:03:37,444 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-24 06:03:37,618 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-24 06:03:37,793 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2019-11-24 06:03:37,841 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 06:03:38,486 WARN L192 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147 [2019-11-24 06:03:42,337 WARN L192 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 271 DAG size of output: 205 [2019-11-24 06:03:46,278 WARN L192 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 274 DAG size of output: 205 [2019-11-24 06:03:48,696 WARN L192 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 293 DAG size of output: 153 [2019-11-24 06:03:49,963 WARN L192 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 295 DAG size of output: 157 [2019-11-24 06:03:53,142 WARN L192 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 265 DAG size of output: 193 [2019-11-24 06:03:56,521 WARN L192 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 267 DAG size of output: 196 [2019-11-24 06:04:01,223 WARN L192 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 294 DAG size of output: 192 [2019-11-24 06:04:03,047 WARN L192 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 298 DAG size of output: 161 [2019-11-24 06:04:04,499 WARN L192 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 282 DAG size of output: 168 [2019-11-24 06:04:09,502 WARN L192 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 299 DAG size of output: 186 [2019-11-24 06:04:13,457 WARN L192 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 303 DAG size of output: 182 [2019-11-24 06:04:18,888 WARN L192 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 349 DAG size of output: 168 [2019-11-24 06:04:20,620 WARN L192 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 349 DAG size of output: 168 [2019-11-24 06:04:22,494 WARN L192 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 345 DAG size of output: 175 [2019-11-24 06:04:23,569 WARN L192 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 167 [2019-11-24 06:04:30,576 WARN L192 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 350 DAG size of output: 173 [2019-11-24 06:04:32,842 WARN L192 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 346 DAG size of output: 170 [2019-11-24 06:04:32,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-24 06:04:32,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 5, 3] total 25 [2019-11-24 06:04:32,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222542935] [2019-11-24 06:04:32,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-24 06:04:32,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:04:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-24 06:04:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2019-11-24 06:04:32,848 INFO L87 Difference]: Start difference. First operand 199 states and 264 transitions. Second operand 20 states. [2019-11-24 06:04:34,111 WARN L192 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 204 DAG size of output: 150 [2019-11-24 06:04:38,448 WARN L192 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 195 DAG size of output: 170 [2019-11-24 06:04:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:04:42,159 INFO L93 Difference]: Finished difference Result 509 states and 680 transitions. [2019-11-24 06:04:42,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-24 06:04:42,160 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 108 [2019-11-24 06:04:42,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:04:42,163 INFO L225 Difference]: With dead ends: 509 [2019-11-24 06:04:42,163 INFO L226 Difference]: Without dead ends: 312 [2019-11-24 06:04:42,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 225 SyntacticMatches, 78 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 57.6s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2019-11-24 06:04:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-11-24 06:04:42,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 305. [2019-11-24 06:04:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2019-11-24 06:04:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 372 transitions. [2019-11-24 06:04:42,187 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 372 transitions. Word has length 108 [2019-11-24 06:04:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:04:42,188 INFO L462 AbstractCegarLoop]: Abstraction has 305 states and 372 transitions. [2019-11-24 06:04:42,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-24 06:04:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 372 transitions. [2019-11-24 06:04:42,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-24 06:04:42,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:04:42,190 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:04:42,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:04:42,398 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:04:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:04:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -140342742, now seen corresponding path program 1 times [2019-11-24 06:04:42,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:04:42,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784015561] [2019-11-24 06:04:42,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:04:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-24 06:04:42,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784015561] [2019-11-24 06:04:42,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:04:42,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:04:42,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901845030] [2019-11-24 06:04:42,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:04:42,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:04:42,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:04:42,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:04:42,454 INFO L87 Difference]: Start difference. First operand 305 states and 372 transitions. Second operand 3 states. [2019-11-24 06:04:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:04:42,483 INFO L93 Difference]: Finished difference Result 679 states and 866 transitions. [2019-11-24 06:04:42,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:04:42,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2019-11-24 06:04:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:04:42,486 INFO L225 Difference]: With dead ends: 679 [2019-11-24 06:04:42,486 INFO L226 Difference]: Without dead ends: 482 [2019-11-24 06:04:42,487 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 [2019-11-24 06:04:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2019-11-24 06:04:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 480. [2019-11-24 06:04:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2019-11-24 06:04:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 598 transitions. [2019-11-24 06:04:42,510 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 598 transitions. Word has length 111 [2019-11-24 06:04:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:04:42,510 INFO L462 AbstractCegarLoop]: Abstraction has 480 states and 598 transitions. [2019-11-24 06:04:42,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:04:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 598 transitions. [2019-11-24 06:04:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-24 06:04:42,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:04:42,513 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:04:42,513 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:04:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:04:42,513 INFO L82 PathProgramCache]: Analyzing trace with hash -326938988, now seen corresponding path program 1 times [2019-11-24 06:04:42,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:04:42,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295362102] [2019-11-24 06:04:42,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:04:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-24 06:04:42,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295362102] [2019-11-24 06:04:42,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:04:42,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:04:42,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135722446] [2019-11-24 06:04:42,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:04:42,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:04:42,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:04:42,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:04:42,557 INFO L87 Difference]: Start difference. First operand 480 states and 598 transitions. Second operand 3 states. [2019-11-24 06:04:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:04:42,610 INFO L93 Difference]: Finished difference Result 691 states and 873 transitions. [2019-11-24 06:04:42,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:04:42,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2019-11-24 06:04:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:04:42,613 INFO L225 Difference]: With dead ends: 691 [2019-11-24 06:04:42,613 INFO L226 Difference]: Without dead ends: 494 [2019-11-24 06:04:42,614 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 [2019-11-24 06:04:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2019-11-24 06:04:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 489. [2019-11-24 06:04:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2019-11-24 06:04:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 606 transitions. [2019-11-24 06:04:42,638 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 606 transitions. Word has length 113 [2019-11-24 06:04:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:04:42,638 INFO L462 AbstractCegarLoop]: Abstraction has 489 states and 606 transitions. [2019-11-24 06:04:42,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:04:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 606 transitions. [2019-11-24 06:04:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-24 06:04:42,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:04:42,641 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:04:42,641 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:04:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:04:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1911560932, now seen corresponding path program 1 times [2019-11-24 06:04:42,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:04:42,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380998691] [2019-11-24 06:04:42,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:04:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-24 06:04:42,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380998691] [2019-11-24 06:04:42,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:04:42,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:04:42,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664293820] [2019-11-24 06:04:42,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:04:42,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:04:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:04:42,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:04:42,682 INFO L87 Difference]: Start difference. First operand 489 states and 606 transitions. Second operand 3 states. [2019-11-24 06:04:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:04:42,853 INFO L93 Difference]: Finished difference Result 936 states and 1218 transitions. [2019-11-24 06:04:42,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:04:42,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2019-11-24 06:04:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:04:42,858 INFO L225 Difference]: With dead ends: 936 [2019-11-24 06:04:42,858 INFO L226 Difference]: Without dead ends: 554 [2019-11-24 06:04:42,859 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 [2019-11-24 06:04:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-11-24 06:04:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 538. [2019-11-24 06:04:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2019-11-24 06:04:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 659 transitions. [2019-11-24 06:04:42,895 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 659 transitions. Word has length 114 [2019-11-24 06:04:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:04:42,895 INFO L462 AbstractCegarLoop]: Abstraction has 538 states and 659 transitions. [2019-11-24 06:04:42,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:04:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 659 transitions. [2019-11-24 06:04:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-24 06:04:42,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:04:42,899 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:04:42,899 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:04:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:04:42,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1055752948, now seen corresponding path program 1 times [2019-11-24 06:04:42,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:04:42,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310446953] [2019-11-24 06:04:42,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:04:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:04:43,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310446953] [2019-11-24 06:04:43,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817374386] [2019-11-24 06:04:43,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:04:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:04:43,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 06:04:43,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:04:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:04:43,169 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:04:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-24 06:04:43,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444886038] [2019-11-24 06:04:43,244 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2019-11-24 06:04:43,244 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:04:43,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:04:43,246 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:04:43,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:04:43,768 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 270 [2019-11-24 06:04:44,030 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 253 [2019-11-24 06:04:44,238 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 253 [2019-11-24 06:04:44,425 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 250 [2019-11-24 06:04:44,968 WARN L192 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 311 [2019-11-24 06:04:45,666 WARN L192 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 311 [2019-11-24 06:04:45,908 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 274 [2019-11-24 06:04:46,036 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 274 [2019-11-24 06:04:46,820 WARN L192 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 318 [2019-11-24 06:04:47,050 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 318 [2019-11-24 06:04:47,200 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 307 [2019-11-24 06:04:47,839 WARN L192 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 385 [2019-11-24 06:04:48,361 WARN L192 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 385 [2019-11-24 06:04:48,625 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 287 [2019-11-24 06:04:48,772 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 287 [2019-11-24 06:04:49,180 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 265 [2019-11-24 06:04:49,323 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 265 [2019-11-24 06:04:49,435 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 260 [2019-11-24 06:04:49,588 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 265 [2019-11-24 06:04:49,739 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 265 [2019-11-24 06:04:49,850 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 260 [2019-11-24 06:04:50,009 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 275 [2019-11-24 06:04:50,160 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 275 [2019-11-24 06:04:50,276 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 270 [2019-11-24 06:04:50,437 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 285 [2019-11-24 06:04:50,931 WARN L192 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 353 [2019-11-24 06:04:51,238 WARN L192 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 353 [2019-11-24 06:04:51,521 WARN L192 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-24 06:04:51,826 WARN L192 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 353 [2019-11-24 06:04:52,134 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 353 [2019-11-24 06:04:52,413 WARN L192 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-24 06:04:52,867 WARN L192 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-24 06:04:53,231 WARN L192 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-24 06:04:53,578 WARN L192 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-24 06:04:53,928 WARN L192 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 376