/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/array-examples/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:12:35,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:12:35,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:12:35,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:12:35,411 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 [2019-11-23 23:12:35,437 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:12:35,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:12:35,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:12:35,439 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:12:35,439 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:12:35,440 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:12:35,442 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:12:35,442 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:12:35,442 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:12:35,443 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:12:35,443 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:12:35,443 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:12:35,443 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:12:35,443 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:12:35,444 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:12:35,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:12:35,444 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:12:35,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:12:35,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:12:35,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:12:35,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:12:35,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:12:35,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:12:35,447 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:12:35,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:12:35,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:12:35,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:12:35,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:12:35,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:12:35,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:12:35,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:12:35,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:12:35,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:12:35,451 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:12:35,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:12:35,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:12:35,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:12:35,453 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:12:35,757 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:12:35,778 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:12:35,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:12:35,782 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:12:35,783 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:12:35,783 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-11-23 23:12:35,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185089f69/2fa6bc34644e4dc596d9a82633dcae7a/FLAG752e1c976 [2019-11-23 23:12:36,294 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:12:36,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2019-11-23 23:12:36,302 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185089f69/2fa6bc34644e4dc596d9a82633dcae7a/FLAG752e1c976 [2019-11-23 23:12:36,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/185089f69/2fa6bc34644e4dc596d9a82633dcae7a [2019-11-23 23:12:36,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:12:36,693 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:12:36,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:12:36,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:12:36,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:12:36,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:36,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5362047b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36, skipping insertion in model container [2019-11-23 23:12:36,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:36,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:12:36,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:12:36,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:12:36,898 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:12:36,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:12:36,935 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:12:36,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36 WrapperNode [2019-11-23 23:12:36,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:12:36,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:12:36,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:12:36,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:12:36,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:37,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:37,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:12:37,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:12:37,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:12:37,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:12:37,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:37,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:37,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:37,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:37,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:37,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:37,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (1/1) ... [2019-11-23 23:12:37,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:12:37,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:12:37,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:12:37,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:12:37,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (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 [2019-11-23 23:12:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:12:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:12:37,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:12:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:12:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:12:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:12:37,620 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:12:37,620 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 23:12:37,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:12:37 BoogieIcfgContainer [2019-11-23 23:12:37,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:12:37,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:12:37,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:12:37,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:12:37,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:12:36" (1/3) ... [2019-11-23 23:12:37,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8347f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:12:37, skipping insertion in model container [2019-11-23 23:12:37,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:12:36" (2/3) ... [2019-11-23 23:12:37,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8347f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:12:37, skipping insertion in model container [2019-11-23 23:12:37,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:12:37" (3/3) ... [2019-11-23 23:12:37,629 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2019-11-23 23:12:37,639 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:12:37,646 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:12:37,656 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:12:37,681 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:12:37,681 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:12:37,681 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:12:37,681 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:12:37,682 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:12:37,682 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:12:37,682 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:12:37,682 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:12:37,696 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 23:12:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 23:12:37,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:37,703 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:12:37,703 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash -212737064, now seen corresponding path program 1 times [2019-11-23 23:12:37,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:37,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176778201] [2019-11-23 23:12:37,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:12:37,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176778201] [2019-11-23 23:12:37,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:12:37,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:12:37,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678017900] [2019-11-23 23:12:37,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:12:37,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:12:37,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:12:37,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:12:37,887 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-23 23:12:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:12:37,915 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2019-11-23 23:12:37,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:12:37,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-23 23:12:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:12:37,926 INFO L225 Difference]: With dead ends: 19 [2019-11-23 23:12:37,927 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 23:12:37,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:12:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 23:12:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 23:12:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:12:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2019-11-23 23:12:37,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2019-11-23 23:12:37,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:12:37,960 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-23 23:12:37,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:12:37,961 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2019-11-23 23:12:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:12:37,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:37,962 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:12:37,962 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash -811467798, now seen corresponding path program 1 times [2019-11-23 23:12:37,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:37,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102731889] [2019-11-23 23:12:37,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:12:38,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102731889] [2019-11-23 23:12:38,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:12:38,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:12:38,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083649652] [2019-11-23 23:12:38,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:12:38,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:12:38,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:12:38,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:12:38,014 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 3 states. [2019-11-23 23:12:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:12:38,030 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2019-11-23 23:12:38,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:12:38,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 23:12:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:12:38,031 INFO L225 Difference]: With dead ends: 18 [2019-11-23 23:12:38,032 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 23:12:38,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:12:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 23:12:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 23:12:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 23:12:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2019-11-23 23:12:38,037 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2019-11-23 23:12:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:12:38,037 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2019-11-23 23:12:38,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:12:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2019-11-23 23:12:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 23:12:38,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:12:38,039 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:12:38,039 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:12:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:12:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1975506605, now seen corresponding path program 1 times [2019-11-23 23:12:38,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:12:38,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676585379] [2019-11-23 23:12:38,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:12:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:12:38,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676585379] [2019-11-23 23:12:38,106 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335967807] [2019-11-23 23:12:38,106 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 [2019-11-23 23:12:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:12:38,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:12:38,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:12:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:12:38,190 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:12:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 23:12:38,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405853018] [2019-11-23 23:12:38,266 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 23:12:38,266 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:12:38,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:12:38,292 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:12:38,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:12:39,885 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 125 [2019-11-23 23:12:40,340 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-11-23 23:12:40,465 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 139 [2019-11-23 23:12:40,615 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 139 [2019-11-23 23:12:41,451 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2019-11-23 23:12:42,274 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 169 [2019-11-23 23:12:42,415 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 167 [2019-11-23 23:12:42,628 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 169 [2019-11-23 23:12:45,402 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 183 [2019-11-23 23:12:45,544 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 180 [2019-11-23 23:12:47,593 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 188 [2019-11-23 23:12:48,815 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 204 [2019-11-23 23:12:49,003 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2019-11-23 23:12:49,202 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 205 [2019-11-23 23:12:50,501 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 210 [2019-11-23 23:12:52,687 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 214 [2019-11-23 23:12:54,418 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 219 [2019-11-23 23:12:57,578 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 231 [2019-11-23 23:13:00,534 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2019-11-23 23:13:00,648 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 236 [2019-11-23 23:13:02,222 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 249 [2019-11-23 23:13:04,176 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 257 [2019-11-23 23:13:05,931 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 261 [2019-11-23 23:13:06,065 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 260 [2019-11-23 23:13:07,755 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 263 [2019-11-23 23:13:07,873 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 262 [2019-11-23 23:13:09,679 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 265 [2019-11-23 23:13:09,805 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 265 [2019-11-23 23:13:09,950 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 268 [2019-11-23 23:13:10,084 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 268 [2019-11-23 23:13:10,213 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 271 [2019-11-23 23:13:10,342 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 270 [2019-11-23 23:13:10,473 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 272 [2019-11-23 23:13:10,598 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 273 [2019-11-23 23:13:12,645 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-23 23:13:12,769 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 278 [2019-11-23 23:13:14,687 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 286 [2019-11-23 23:13:14,820 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 283 [2019-11-23 23:13:17,012 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-23 23:13:17,147 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 286 [2019-11-23 23:13:19,289 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2019-11-23 23:13:19,437 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 289 [2019-11-23 23:13:21,703 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2019-11-23 23:13:21,851 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 291 [2019-11-23 23:13:22,026 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2019-11-23 23:13:22,172 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 291 [2019-11-23 23:13:22,411 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 294 [2019-11-23 23:13:24,844 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-11-23 23:13:24,986 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 298 [2019-11-23 23:13:27,153 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 304 [2019-11-23 23:13:27,295 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 302 [2019-11-23 23:13:29,425 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 307 [2019-11-23 23:13:29,574 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 307 [2019-11-23 23:13:31,838 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 312 [2019-11-23 23:13:31,997 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 310 [2019-11-23 23:13:34,349 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2019-11-23 23:13:34,493 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 315 [2019-11-23 23:13:37,023 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 322 [2019-11-23 23:13:37,179 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 320 [2019-11-23 23:13:39,572 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 326 [2019-11-23 23:13:39,756 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 323 [2019-11-23 23:13:39,914 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-23 23:13:40,054 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 326 [2019-11-23 23:13:42,752 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 330 [2019-11-23 23:13:42,929 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 328 [2019-11-23 23:13:43,080 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-23 23:13:43,268 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 330 [2019-11-23 23:13:46,005 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 334 [2019-11-23 23:13:46,158 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 335 [2019-11-23 23:13:49,007 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 23:13:49,184 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 338 [2019-11-23 23:13:51,924 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 343 [2019-11-23 23:13:52,105 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 340 [2019-11-23 23:13:55,058 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 343 [2019-11-23 23:13:55,211 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 344 [2019-11-23 23:13:58,287 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:13:58,490 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 346 [2019-11-23 23:13:58,663 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 23:13:58,821 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 348 [2019-11-23 23:14:01,932 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-23 23:14:02,100 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 353 [2019-11-23 23:14:04,940 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 358 [2019-11-23 23:14:05,124 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 356 [2019-11-23 23:14:08,124 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-23 23:14:08,323 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 358