/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_two_index_01.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:14:30,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:14:30,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:14:31,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 23:14:31,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:14:31,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:14:31,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:14:31,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:14:31,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:14:31,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:14:31,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:14:31,052 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:14:31,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:14:31,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:14:31,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:14:31,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:14:31,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:14:31,076 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 23:14:31,095 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:14:31,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:14:31,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:14:31,096 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:14:31,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:14:31,097 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:14:31,097 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:14:31,097 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:14:31,097 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:14:31,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:14:31,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:14:31,098 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:14:31,098 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:14:31,098 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:14:31,099 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:14:31,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:14:31,100 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:14:31,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:14:31,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:14:31,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:14:31,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:14:31,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:14:31,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:14:31,101 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:14:31,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:14:31,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:14:31,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:14:31,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:14:31,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:14:31,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:14:31,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:14:31,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:14:31,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:14:31,103 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:14:31,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:14:31,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:14:31,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:14:31,104 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:14:31,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:14:31,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:14:31,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:14:31,418 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:14:31,419 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:14:31,419 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_01.i [2019-11-23 23:14:31,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8956b25/1ed1472d32454c94982565d01bbe0bd3/FLAG9fa3be6a1 [2019-11-23 23:14:31,886 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:14:31,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_01.i [2019-11-23 23:14:31,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8956b25/1ed1472d32454c94982565d01bbe0bd3/FLAG9fa3be6a1 [2019-11-23 23:14:32,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8956b25/1ed1472d32454c94982565d01bbe0bd3 [2019-11-23 23:14:32,256 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:14:32,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:14:32,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:14:32,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:14:32,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:14:32,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41437b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32, skipping insertion in model container [2019-11-23 23:14:32,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:14:32,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:14:32,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:14:32,542 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:14:32,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:14:32,586 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:14:32,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32 WrapperNode [2019-11-23 23:14:32,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:14:32,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:14:32,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:14:32,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:14:32,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:14:32,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:14:32,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:14:32,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:14:32,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (1/1) ... [2019-11-23 23:14:32,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:14:32,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:14:32,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:14:32,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:14:32,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (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 23:14:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 23:14:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:14:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:14:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 23:14:32,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 23:14:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 23:14:33,095 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:14:33,095 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 23:14:33,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:14:33 BoogieIcfgContainer [2019-11-23 23:14:33,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:14:33,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:14:33,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:14:33,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:14:33,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:14:32" (1/3) ... [2019-11-23 23:14:33,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7310a9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:14:33, skipping insertion in model container [2019-11-23 23:14:33,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:14:32" (2/3) ... [2019-11-23 23:14:33,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7310a9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:14:33, skipping insertion in model container [2019-11-23 23:14:33,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:14:33" (3/3) ... [2019-11-23 23:14:33,110 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_01.i [2019-11-23 23:14:33,135 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:14:33,151 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:14:33,167 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:14:33,192 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:14:33,192 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:14:33,192 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:14:33,193 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:14:33,193 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:14:33,193 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:14:33,193 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:14:33,193 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:14:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 23:14:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 23:14:33,222 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:14:33,223 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 23:14:33,223 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:14:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:14:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1774611857, now seen corresponding path program 1 times [2019-11-23 23:14:33,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:14:33,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802464414] [2019-11-23 23:14:33,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:14:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:33,416 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 23:14:33,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802464414] [2019-11-23 23:14:33,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:14:33,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:14:33,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995013831] [2019-11-23 23:14:33,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:14:33,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:14:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:14:33,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:14:33,441 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-23 23:14:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:14:33,503 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2019-11-23 23:14:33,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:14:33,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 23:14:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:14:33,516 INFO L225 Difference]: With dead ends: 23 [2019-11-23 23:14:33,516 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 23:14:33,519 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 23:14:33,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 23:14:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2019-11-23 23:14:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 23:14:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-11-23 23:14:33,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2019-11-23 23:14:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:14:33,557 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-11-23 23:14:33,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:14:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-11-23 23:14:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 23:14:33,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:14:33,558 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:14:33,559 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:14:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:14:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1794071560, now seen corresponding path program 1 times [2019-11-23 23:14:33,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:14:33,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096285612] [2019-11-23 23:14:33,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:14:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:14:33,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096285612] [2019-11-23 23:14:33,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274790987] [2019-11-23 23:14:33,621 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 23:14:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:14:33,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 23:14:33,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:14:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:14:33,695 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:14:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 23:14:33,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225104354] [2019-11-23 23:14:33,759 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-23 23:14:33,759 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:14:33,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:14:33,800 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:14:33,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:14:42,042 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2019-11-23 23:14:42,169 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 184 [2019-11-23 23:14:45,550 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2019-11-23 23:14:45,791 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 195 [2019-11-23 23:14:56,332 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2019-11-23 23:15:07,782 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 277 [2019-11-23 23:15:09,494 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 280 [2019-11-23 23:15:11,522 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2019-11-23 23:15:13,411 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2019-11-23 23:15:13,518 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 292 [2019-11-23 23:15:15,568 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2019-11-23 23:15:15,728 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 295 [2019-11-23 23:15:17,531 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-11-23 23:15:17,666 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 295 [2019-11-23 23:15:19,762 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 300 [2019-11-23 23:15:21,783 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 302 [2019-11-23 23:15:24,211 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 309 [2019-11-23 23:15:26,418 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 314 [2019-11-23 23:15:28,601 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 322 [2019-11-23 23:15:28,729 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 317 [2019-11-23 23:15:30,994 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2019-11-23 23:15:31,112 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 320 [2019-11-23 23:15:33,228 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 324 [2019-11-23 23:15:33,358 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 324 [2019-11-23 23:15:35,538 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 329 [2019-11-23 23:15:35,671 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 327 [2019-11-23 23:15:38,034 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 332 [2019-11-23 23:15:38,185 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 331 [2019-11-23 23:15:40,506 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 335 [2019-11-23 23:15:40,657 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 335 [2019-11-23 23:15:43,166 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 338 [2019-11-23 23:15:43,315 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 338 [2019-11-23 23:15:43,458 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2019-11-23 23:15:43,608 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 339 [2019-11-23 23:15:43,846 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 340 [2019-11-23 23:15:44,084 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 344 [2019-11-23 23:15:46,999 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2019-11-23 23:15:47,219 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 348 [2019-11-23 23:15:49,908 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2019-11-23 23:15:50,029 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 352 [2019-11-23 23:15:53,012 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2019-11-23 23:15:53,142 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2019-11-23 23:15:55,935 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2019-11-23 23:15:56,062 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 360 [2019-11-23 23:15:58,750 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-11-23 23:15:58,896 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 362 [2019-11-23 23:16:01,517 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-11-23 23:16:01,656 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 363 [2019-11-23 23:16:04,191 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 369 [2019-11-23 23:16:04,335 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 366 [2019-11-23 23:16:04,485 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 369 [2019-11-23 23:16:04,629 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 369 [2019-11-23 23:16:04,775 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 372 [2019-11-23 23:16:04,918 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 372 [2019-11-23 23:16:05,066 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 375 [2019-11-23 23:16:05,197 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 376