/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/heap-data/calendar.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 00:36:57,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 00:36:57,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 00:36:58,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 00:36:58,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 00:36:58,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 00:36:58,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 00:36:58,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 00:36:58,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 00:36:58,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 00:36:58,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 00:36:58,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-24 00:36:58,075 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 00:36:58,109 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 00:36:58,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 00:36:58,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 00:36:58,113 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 00:36:58,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 00:36:58,113 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 00:36:58,114 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 00:36:58,114 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 00:36:58,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 00:36:58,114 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 00:36:58,114 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 00:36:58,115 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 00:36:58,115 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 00:36:58,115 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 00:36:58,115 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 00:36:58,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 00:36:58,120 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 00:36:58,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 00:36:58,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 00:36:58,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 00:36:58,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 00:36:58,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 00:36:58,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 00:36:58,121 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 00:36:58,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 00:36:58,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 00:36:58,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 00:36:58,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 00:36:58,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 00:36:58,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 00:36:58,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 00:36:58,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 00:36:58,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 00:36:58,124 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 00:36:58,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 00:36:58,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 00:36:58,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 00:36:58,125 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 00:36:58,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 00:36:58,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 00:36:58,431 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 00:36:58,433 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 00:36:58,433 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 00:36:58,434 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/calendar.i [2019-11-24 00:36:58,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6626d7b0a/44609440e7b74b0fa7d5dfb93253235c/FLAGd9fd67c1b [2019-11-24 00:36:59,044 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 00:36:59,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-data/calendar.i [2019-11-24 00:36:59,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6626d7b0a/44609440e7b74b0fa7d5dfb93253235c/FLAGd9fd67c1b [2019-11-24 00:36:59,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6626d7b0a/44609440e7b74b0fa7d5dfb93253235c [2019-11-24 00:36:59,374 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 00:36:59,375 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 00:36:59,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 00:36:59,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 00:36:59,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 00:36:59,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:36:59" (1/1) ... [2019-11-24 00:36:59,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d98df98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:36:59, skipping insertion in model container [2019-11-24 00:36:59,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:36:59" (1/1) ... [2019-11-24 00:36:59,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 00:36:59,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 00:36:59,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 00:36:59,924 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 00:36:59,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 00:37:00,022 INFO L208 MainTranslator]: Completed translation [2019-11-24 00:37:00,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00 WrapperNode [2019-11-24 00:37:00,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 00:37:00,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 00:37:00,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 00:37:00,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 00:37:00,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (1/1) ... [2019-11-24 00:37:00,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (1/1) ... [2019-11-24 00:37:00,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 00:37:00,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 00:37:00,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 00:37:00,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 00:37:00,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (1/1) ... [2019-11-24 00:37:00,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (1/1) ... [2019-11-24 00:37:00,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (1/1) ... [2019-11-24 00:37:00,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (1/1) ... [2019-11-24 00:37:00,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (1/1) ... [2019-11-24 00:37:00,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (1/1) ... [2019-11-24 00:37:00,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (1/1) ... [2019-11-24 00:37:00,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 00:37:00,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 00:37:00,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 00:37:00,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 00:37:00,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (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 00:37:00,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 00:37:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 00:37:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 00:37:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 00:37:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 00:37:00,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 00:37:00,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 00:37:00,659 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 00:37:00,659 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-24 00:37:00,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:37:00 BoogieIcfgContainer [2019-11-24 00:37:00,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 00:37:00,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 00:37:00,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 00:37:00,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 00:37:00,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:36:59" (1/3) ... [2019-11-24 00:37:00,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fe0a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:37:00, skipping insertion in model container [2019-11-24 00:37:00,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:37:00" (2/3) ... [2019-11-24 00:37:00,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33fe0a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:37:00, skipping insertion in model container [2019-11-24 00:37:00,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:37:00" (3/3) ... [2019-11-24 00:37:00,673 INFO L109 eAbstractionObserver]: Analyzing ICFG calendar.i [2019-11-24 00:37:00,687 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 00:37:00,694 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 00:37:00,703 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 00:37:00,724 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 00:37:00,724 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 00:37:00,724 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 00:37:00,724 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 00:37:00,724 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 00:37:00,725 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 00:37:00,725 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 00:37:00,725 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 00:37:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-11-24 00:37:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 00:37:00,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:00,745 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 00:37:00,745 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1380404277, now seen corresponding path program 1 times [2019-11-24 00:37:00,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:00,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529456777] [2019-11-24 00:37:00,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:00,870 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 00:37:00,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529456777] [2019-11-24 00:37:00,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:37:00,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 00:37:00,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142543208] [2019-11-24 00:37:00,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 00:37:00,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:37:00,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 00:37:00,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 00:37:00,898 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2019-11-24 00:37:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:37:00,916 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2019-11-24 00:37:00,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 00:37:00,918 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-24 00:37:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:37:00,928 INFO L225 Difference]: With dead ends: 20 [2019-11-24 00:37:00,929 INFO L226 Difference]: Without dead ends: 12 [2019-11-24 00:37:00,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 00:37:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-24 00:37:00,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-24 00:37:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-24 00:37:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-24 00:37:00,970 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 6 [2019-11-24 00:37:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:37:00,970 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-24 00:37:00,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 00:37:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-24 00:37:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 00:37:00,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:00,971 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:37:00,972 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:00,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1170733020, now seen corresponding path program 1 times [2019-11-24 00:37:00,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:00,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994282827] [2019-11-24 00:37:00,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:01,130 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 00:37:01,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994282827] [2019-11-24 00:37:01,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:37:01,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 00:37:01,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191786307] [2019-11-24 00:37:01,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 00:37:01,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:37:01,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 00:37:01,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 00:37:01,134 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 4 states. [2019-11-24 00:37:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:37:01,194 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 00:37:01,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 00:37:01,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 00:37:01,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:37:01,196 INFO L225 Difference]: With dead ends: 24 [2019-11-24 00:37:01,196 INFO L226 Difference]: Without dead ends: 17 [2019-11-24 00:37:01,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 00:37:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-24 00:37:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-24 00:37:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-24 00:37:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2019-11-24 00:37:01,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2019-11-24 00:37:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:37:01,203 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2019-11-24 00:37:01,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 00:37:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2019-11-24 00:37:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 00:37:01,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:01,205 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:37:01,205 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:01,206 INFO L82 PathProgramCache]: Analyzing trace with hash -580640778, now seen corresponding path program 1 times [2019-11-24 00:37:01,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:01,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866036086] [2019-11-24 00:37:01,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:01,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866036086] [2019-11-24 00:37:01,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 00:37:01,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 00:37:01,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240768417] [2019-11-24 00:37:01,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 00:37:01,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 00:37:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 00:37:01,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-24 00:37:01,588 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 6 states. [2019-11-24 00:37:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 00:37:02,002 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-11-24 00:37:02,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 00:37:02,003 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-24 00:37:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 00:37:02,004 INFO L225 Difference]: With dead ends: 35 [2019-11-24 00:37:02,004 INFO L226 Difference]: Without dead ends: 33 [2019-11-24 00:37:02,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-24 00:37:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-24 00:37:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 19. [2019-11-24 00:37:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-24 00:37:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-24 00:37:02,013 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 13 [2019-11-24 00:37:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 00:37:02,014 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-24 00:37:02,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 00:37:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-24 00:37:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 00:37:02,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 00:37:02,015 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 00:37:02,015 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 00:37:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 00:37:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2032193669, now seen corresponding path program 1 times [2019-11-24 00:37:02,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 00:37:02,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579834200] [2019-11-24 00:37:02,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 00:37:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:02,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579834200] [2019-11-24 00:37:02,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995105374] [2019-11-24 00:37:02,182 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 00:37:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 00:37:02,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-24 00:37:02,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 00:37:02,333 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-24 00:37:02,334 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:02,340 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:02,343 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-24 00:37:02,344 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:02,356 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:02,357 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 00:37:02,357 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2019-11-24 00:37:02,375 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-24 00:37:02,376 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:02,382 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:02,385 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-24 00:37:02,386 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 00:37:02,391 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 00:37:02,391 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 00:37:02,391 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:7 [2019-11-24 00:37:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:02,394 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 00:37:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 00:37:02,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764494351] [2019-11-24 00:37:02,431 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-24 00:37:02,431 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 00:37:02,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 00:37:02,451 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 00:37:02,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 00:37:05,666 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 376 [2019-11-24 00:37:09,235 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 373 [2019-11-24 00:37:12,164 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 370 [2019-11-24 00:37:14,509 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 367 [2019-11-24 00:37:24,640 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 359 [2019-11-24 00:37:36,463 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 350 [2019-11-24 00:37:37,300 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2019-11-24 00:37:45,173 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 335