/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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:46:29,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:46:29,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:46:29,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 05:46:29,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:46:29,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:46:29,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:46:29,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:46:29,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:46:29,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:46:29,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:46:29,635 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:46:29,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:46:29,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:46:29,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:46:29,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:46:29,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:46:29,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:46:29,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:46:29,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:46:29,651 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 05:46:29,665 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:46:29,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:46:29,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:46:29,666 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:46:29,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:46:29,667 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:46:29,667 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:46:29,667 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:46:29,667 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:46:29,667 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:46:29,668 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:46:29,668 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:46:29,668 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:46:29,668 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:46:29,668 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:46:29,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:46:29,669 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:46:29,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:46:29,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:46:29,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:46:29,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:46:29,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:46:29,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:46:29,671 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:46:29,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:46:29,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:46:29,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:46:29,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:46:29,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:46:29,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:46:29,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:46:29,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:46:29,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:46:29,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:46:29,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:46:29,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:46:29,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:46:29,673 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:46:29,959 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:46:29,973 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:46:29,977 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:46:29,978 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:46:29,978 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:46:29,979 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-24 05:46:30,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a26be018/7619b1038e244c3bb224f2198e363eb1/FLAGdeb283a78 [2019-11-24 05:46:30,555 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:46:30,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-24 05:46:30,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a26be018/7619b1038e244c3bb224f2198e363eb1/FLAGdeb283a78 [2019-11-24 05:46:30,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a26be018/7619b1038e244c3bb224f2198e363eb1 [2019-11-24 05:46:30,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:46:30,906 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:46:30,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:46:30,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:46:30,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:46:30,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:46:30" (1/1) ... [2019-11-24 05:46:30,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c73a1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:30, skipping insertion in model container [2019-11-24 05:46:30,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:46:30" (1/1) ... [2019-11-24 05:46:30,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:46:30,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:46:31,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:46:31,201 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:46:31,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:46:31,366 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:46:31,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31 WrapperNode [2019-11-24 05:46:31,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:46:31,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:46:31,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:46:31,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:46:31,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (1/1) ... [2019-11-24 05:46:31,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (1/1) ... [2019-11-24 05:46:31,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:46:31,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:46:31,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:46:31,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:46:31,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (1/1) ... [2019-11-24 05:46:31,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (1/1) ... [2019-11-24 05:46:31,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (1/1) ... [2019-11-24 05:46:31,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (1/1) ... [2019-11-24 05:46:31,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (1/1) ... [2019-11-24 05:46:31,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (1/1) ... [2019-11-24 05:46:31,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (1/1) ... [2019-11-24 05:46:31,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:46:31,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:46:31,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:46:31,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:46:31,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (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 05:46:31,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:46:31,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:46:32,383 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:46:32,384 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-24 05:46:32,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:46:32 BoogieIcfgContainer [2019-11-24 05:46:32,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:46:32,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:46:32,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:46:32,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:46:32,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:46:30" (1/3) ... [2019-11-24 05:46:32,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10622ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:46:32, skipping insertion in model container [2019-11-24 05:46:32,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:46:31" (2/3) ... [2019-11-24 05:46:32,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10622ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:46:32, skipping insertion in model container [2019-11-24 05:46:32,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:46:32" (3/3) ... [2019-11-24 05:46:32,394 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-11-24 05:46:32,404 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:46:32,412 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:46:32,427 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:46:32,459 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:46:32,459 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:46:32,459 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:46:32,459 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:46:32,460 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:46:32,460 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:46:32,460 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:46:32,460 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:46:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2019-11-24 05:46:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-24 05:46:32,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:46:32,486 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] [2019-11-24 05:46:32,486 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:46:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:46:32,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2116793838, now seen corresponding path program 1 times [2019-11-24 05:46:32,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:46:32,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579136091] [2019-11-24 05:46:32,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:46:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:46:32,813 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 05:46:32,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579136091] [2019-11-24 05:46:32,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:46:32,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:46:32,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345923118] [2019-11-24 05:46:32,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:46:32,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:46:32,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:46:32,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:46:32,841 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2019-11-24 05:46:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:46:32,933 INFO L93 Difference]: Finished difference Result 133 states and 202 transitions. [2019-11-24 05:46:32,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:46:32,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-24 05:46:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:46:32,950 INFO L225 Difference]: With dead ends: 133 [2019-11-24 05:46:32,950 INFO L226 Difference]: Without dead ends: 89 [2019-11-24 05:46:32,956 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 05:46:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-24 05:46:33,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-24 05:46:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-24 05:46:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2019-11-24 05:46:33,015 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 28 [2019-11-24 05:46:33,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:46:33,016 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2019-11-24 05:46:33,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:46:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2019-11-24 05:46:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-24 05:46:33,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:46:33,018 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] [2019-11-24 05:46:33,018 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:46:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:46:33,019 INFO L82 PathProgramCache]: Analyzing trace with hash -342250993, now seen corresponding path program 1 times [2019-11-24 05:46:33,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:46:33,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709820978] [2019-11-24 05:46:33,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:46:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:46:33,122 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 05:46:33,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709820978] [2019-11-24 05:46:33,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:46:33,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:46:33,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071693362] [2019-11-24 05:46:33,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:46:33,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:46:33,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:46:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:46:33,133 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand 3 states. [2019-11-24 05:46:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:46:33,165 INFO L93 Difference]: Finished difference Result 201 states and 288 transitions. [2019-11-24 05:46:33,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:46:33,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2019-11-24 05:46:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:46:33,168 INFO L225 Difference]: With dead ends: 201 [2019-11-24 05:46:33,168 INFO L226 Difference]: Without dead ends: 133 [2019-11-24 05:46:33,170 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 05:46:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-24 05:46:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2019-11-24 05:46:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-24 05:46:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 184 transitions. [2019-11-24 05:46:33,190 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 184 transitions. Word has length 30 [2019-11-24 05:46:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:46:33,190 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 184 transitions. [2019-11-24 05:46:33,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:46:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 184 transitions. [2019-11-24 05:46:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-24 05:46:33,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:46:33,192 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] [2019-11-24 05:46:33,192 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:46:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:46:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash 233271933, now seen corresponding path program 1 times [2019-11-24 05:46:33,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:46:33,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39347550] [2019-11-24 05:46:33,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:46:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:46:33,272 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 05:46:33,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39347550] [2019-11-24 05:46:33,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:46:33,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:46:33,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323287429] [2019-11-24 05:46:33,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:46:33,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:46:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:46:33,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:46:33,275 INFO L87 Difference]: Start difference. First operand 131 states and 184 transitions. Second operand 3 states. [2019-11-24 05:46:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:46:33,330 INFO L93 Difference]: Finished difference Result 311 states and 446 transitions. [2019-11-24 05:46:33,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:46:33,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2019-11-24 05:46:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:46:33,341 INFO L225 Difference]: With dead ends: 311 [2019-11-24 05:46:33,345 INFO L226 Difference]: Without dead ends: 199 [2019-11-24 05:46:33,346 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 05:46:33,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-11-24 05:46:33,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2019-11-24 05:46:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-24 05:46:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 276 transitions. [2019-11-24 05:46:33,397 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 276 transitions. Word has length 33 [2019-11-24 05:46:33,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:46:33,403 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 276 transitions. [2019-11-24 05:46:33,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:46:33,403 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 276 transitions. [2019-11-24 05:46:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-24 05:46:33,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:46:33,405 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] [2019-11-24 05:46:33,405 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:46:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:46:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash 579200400, now seen corresponding path program 1 times [2019-11-24 05:46:33,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:46:33,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391931864] [2019-11-24 05:46:33,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:46:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:46:33,577 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 05:46:33,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391931864] [2019-11-24 05:46:33,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:46:33,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:46:33,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547339492] [2019-11-24 05:46:33,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 05:46:33,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:46:33,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 05:46:33,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:46:33,580 INFO L87 Difference]: Start difference. First operand 197 states and 276 transitions. Second operand 5 states. [2019-11-24 05:46:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:46:33,667 INFO L93 Difference]: Finished difference Result 643 states and 911 transitions. [2019-11-24 05:46:33,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 05:46:33,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-11-24 05:46:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:46:33,671 INFO L225 Difference]: With dead ends: 643 [2019-11-24 05:46:33,671 INFO L226 Difference]: Without dead ends: 465 [2019-11-24 05:46:33,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:46:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2019-11-24 05:46:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 461. [2019-11-24 05:46:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2019-11-24 05:46:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 648 transitions. [2019-11-24 05:46:33,718 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 648 transitions. Word has length 36 [2019-11-24 05:46:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:46:33,719 INFO L462 AbstractCegarLoop]: Abstraction has 461 states and 648 transitions. [2019-11-24 05:46:33,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 05:46:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 648 transitions. [2019-11-24 05:46:33,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-24 05:46:33,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:46:33,721 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] [2019-11-24 05:46:33,721 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:46:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:46:33,722 INFO L82 PathProgramCache]: Analyzing trace with hash 519005753, now seen corresponding path program 1 times [2019-11-24 05:46:33,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:46:33,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125817817] [2019-11-24 05:46:33,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:46:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:46:33,792 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 05:46:33,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125817817] [2019-11-24 05:46:33,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:46:33,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 05:46:33,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364515681] [2019-11-24 05:46:33,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 05:46:33,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:46:33,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 05:46:33,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 05:46:33,796 INFO L87 Difference]: Start difference. First operand 461 states and 648 transitions. Second operand 5 states. [2019-11-24 05:46:34,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:46:34,014 INFO L93 Difference]: Finished difference Result 1186 states and 1688 transitions. [2019-11-24 05:46:34,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 05:46:34,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-11-24 05:46:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:46:34,021 INFO L225 Difference]: With dead ends: 1186 [2019-11-24 05:46:34,022 INFO L226 Difference]: Without dead ends: 744 [2019-11-24 05:46:34,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-24 05:46:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-11-24 05:46:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 742. [2019-11-24 05:46:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2019-11-24 05:46:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1042 transitions. [2019-11-24 05:46:34,102 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1042 transitions. Word has length 38 [2019-11-24 05:46:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:46:34,102 INFO L462 AbstractCegarLoop]: Abstraction has 742 states and 1042 transitions. [2019-11-24 05:46:34,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 05:46:34,103 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1042 transitions. [2019-11-24 05:46:34,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-24 05:46:34,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:46:34,104 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] [2019-11-24 05:46:34,105 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:46:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:46:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash 331639390, now seen corresponding path program 1 times [2019-11-24 05:46:34,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:46:34,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567029707] [2019-11-24 05:46:34,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:46:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:46:34,294 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 05:46:34,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567029707] [2019-11-24 05:46:34,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:46:34,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-24 05:46:34,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136029375] [2019-11-24 05:46:34,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 05:46:34,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:46:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 05:46:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-24 05:46:34,298 INFO L87 Difference]: Start difference. First operand 742 states and 1042 transitions. Second operand 8 states. [2019-11-24 05:46:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:46:34,573 INFO L93 Difference]: Finished difference Result 1571 states and 2228 transitions. [2019-11-24 05:46:34,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-24 05:46:34,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2019-11-24 05:46:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:46:34,582 INFO L225 Difference]: With dead ends: 1571 [2019-11-24 05:46:34,582 INFO L226 Difference]: Without dead ends: 1569 [2019-11-24 05:46:34,583 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-11-24 05:46:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2019-11-24 05:46:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 853. [2019-11-24 05:46:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2019-11-24 05:46:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1197 transitions. [2019-11-24 05:46:34,681 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1197 transitions. Word has length 38 [2019-11-24 05:46:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:46:34,682 INFO L462 AbstractCegarLoop]: Abstraction has 853 states and 1197 transitions. [2019-11-24 05:46:34,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 05:46:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1197 transitions. [2019-11-24 05:46:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-24 05:46:34,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:46:34,684 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:46:34,684 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:46:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:46:34,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1411768444, now seen corresponding path program 1 times [2019-11-24 05:46:34,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:46:34,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323842482] [2019-11-24 05:46:34,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:46:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:46:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:46:35,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323842482] [2019-11-24 05:46:35,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929811924] [2019-11-24 05:46:35,147 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 05:46:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:46:35,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-24 05:46:35,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:46:35,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,789 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:46:35,838 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:46:35,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:35,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 05:46:36,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,226 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2019-11-24 05:46:36,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 5 terms [2019-11-24 05:46:36,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,239 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 05:46:36,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-24 05:46:36,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-24 05:46:36,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,324 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:36,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 05:46:37,031 WARN L192 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2019-11-24 05:46:37,178 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2019-11-24 05:46:37,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 6 terms [2019-11-24 05:46:37,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-24 05:46:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:46:37,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085608342] [2019-11-24 05:46:37,626 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2019-11-24 05:46:37,627 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:46:37,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:46:37,640 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:46:37,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:46:38,326 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 240 [2019-11-24 05:46:39,010 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-24 05:46:39,419 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 280 [2019-11-24 05:47:30,909 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 05:47:31,477 WARN L192 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 105 [2019-11-24 05:47:31,674 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2019-11-24 05:47:31,877 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2019-11-24 05:47:32,102 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-11-24 05:47:32,448 WARN L192 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2019-11-24 05:47:32,781 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2019-11-24 05:47:33,121 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2019-11-24 05:47:33,466 WARN L192 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2019-11-24 05:47:33,832 WARN L192 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2019-11-24 05:47:34,194 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2019-11-24 05:47:34,565 WARN L192 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 96 [2019-11-24 05:47:34,951 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 99 [2019-11-24 05:47:35,360 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2019-11-24 05:47:35,778 WARN L192 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 96 [2019-11-24 05:47:36,181 WARN L192 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 93 [2019-11-24 05:47:36,612 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2019-11-24 05:47:37,056 WARN L192 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 98 [2019-11-24 05:47:37,505 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 100 [2019-11-24 05:47:37,973 WARN L192 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 106 [2019-11-24 05:47:39,977 WARN L192 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 278 DAG size of output: 184 [2019-11-24 05:47:42,342 WARN L192 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 278 DAG size of output: 199 [2019-11-24 05:47:44,699 WARN L192 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 278 DAG size of output: 199 [2019-11-24 05:47:47,275 WARN L192 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 278 DAG size of output: 200