/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/reducercommutativity/max60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:41:30,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:41:30,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:41:30,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 05:41:30,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 05:41:30,701 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:41:30,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:41:30,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:41:30,703 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:41:30,703 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:41:30,703 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:41:30,703 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:41:30,703 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:41:30,704 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:41:30,704 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:41:30,705 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:41:30,705 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:41:30,705 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:41:30,706 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:41:30,706 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:41:30,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:41:30,708 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:41:30,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:41:30,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:41:30,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:41:30,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:41:30,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:41:30,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:41:30,710 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:41:30,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:41:30,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:41:30,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:41:30,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:41:30,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:41:30,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:41:30,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:41:30,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:41:30,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:41:30,713 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:41:30,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:41:30,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:41:30,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:41:30,714 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:41:31,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:41:31,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:41:31,048 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:41:31,049 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:41:31,050 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:41:31,050 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max60-2.i [2019-11-24 05:41:31,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbaea2350/734360e1efc140d3b3f60cda5ed3896e/FLAGbfd2c01e9 [2019-11-24 05:41:31,508 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:41:31,508 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i [2019-11-24 05:41:31,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbaea2350/734360e1efc140d3b3f60cda5ed3896e/FLAGbfd2c01e9 [2019-11-24 05:41:31,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbaea2350/734360e1efc140d3b3f60cda5ed3896e [2019-11-24 05:41:31,903 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:41:31,905 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:41:31,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:41:31,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:41:31,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:41:31,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:41:31" (1/1) ... [2019-11-24 05:41:31,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761eb21b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:31, skipping insertion in model container [2019-11-24 05:41:31,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:41:31" (1/1) ... [2019-11-24 05:41:31,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:41:31,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:41:32,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:41:32,171 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:41:32,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:41:32,234 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:41:32,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32 WrapperNode [2019-11-24 05:41:32,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:41:32,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:41:32,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:41:32,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:41:32,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (1/1) ... [2019-11-24 05:41:32,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (1/1) ... [2019-11-24 05:41:32,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:41:32,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:41:32,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:41:32,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:41:32,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (1/1) ... [2019-11-24 05:41:32,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (1/1) ... [2019-11-24 05:41:32,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (1/1) ... [2019-11-24 05:41:32,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (1/1) ... [2019-11-24 05:41:32,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (1/1) ... [2019-11-24 05:41:32,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (1/1) ... [2019-11-24 05:41:32,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (1/1) ... [2019-11-24 05:41:32,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:41:32,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:41:32,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:41:32,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:41:32,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (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 [2019-11-24 05:41:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:41:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:41:32,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:41:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:41:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:41:32,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:41:33,082 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:41:33,083 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:41:33,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:41:33 BoogieIcfgContainer [2019-11-24 05:41:33,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:41:33,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:41:33,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:41:33,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:41:33,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:41:31" (1/3) ... [2019-11-24 05:41:33,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d88d991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:41:33, skipping insertion in model container [2019-11-24 05:41:33,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:32" (2/3) ... [2019-11-24 05:41:33,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d88d991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:41:33, skipping insertion in model container [2019-11-24 05:41:33,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:41:33" (3/3) ... [2019-11-24 05:41:33,093 INFO L109 eAbstractionObserver]: Analyzing ICFG max60-2.i [2019-11-24 05:41:33,103 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:41:33,110 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:41:33,120 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:41:33,142 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:41:33,142 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:41:33,143 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:41:33,143 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:41:33,143 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:41:33,143 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:41:33,143 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:41:33,144 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:41:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:41:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:41:33,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:33,161 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:33,162 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1794448249, now seen corresponding path program 1 times [2019-11-24 05:41:33,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:33,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363580611] [2019-11-24 05:41:33,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:41:33,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363580611] [2019-11-24 05:41:33,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:41:33,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:41:33,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317834995] [2019-11-24 05:41:33,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:41:33,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:41:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:41:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:41:33,343 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:41:33,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:41:33,371 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:41:33,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:41:33,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:41:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:41:33,382 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:41:33,382 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:41:33,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:41:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:41:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:41:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:41:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:41:33,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:41:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:41:33,418 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:41:33,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:41:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:41:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:41:33,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:33,419 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:33,420 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:33,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:33,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2024605637, now seen corresponding path program 1 times [2019-11-24 05:41:33,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:33,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911277618] [2019-11-24 05:41:33,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:41:33,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911277618] [2019-11-24 05:41:33,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633944454] [2019-11-24 05:41:33,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:41:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:33,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:41:33,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:41:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:41:33,573 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:41:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:41:33,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:41:33,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:41:33,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057788440] [2019-11-24 05:41:33,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:41:33,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:41:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:41:33,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:41:33,593 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:41:33,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:41:33,661 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:41:33,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:41:33,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:41:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:41:33,663 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:41:33,663 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:41:33,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:41:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:41:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:41:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:41:33,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:41:33,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:41:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:41:33,670 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:41:33,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:41:33,671 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:41:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:41:33,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:33,672 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:33,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:41:33,873 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:33,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1835444987, now seen corresponding path program 1 times [2019-11-24 05:41:33,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:33,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514476384] [2019-11-24 05:41:33,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 05:41:33,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514476384] [2019-11-24 05:41:33,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551256051] [2019-11-24 05:41:33,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:41:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:34,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:41:34,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:41:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:41:34,085 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:41:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:41:34,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:41:34,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:41:34,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467712270] [2019-11-24 05:41:34,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:41:34,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:41:34,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:41:34,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:41:34,100 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:41:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:41:34,119 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:41:34,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:41:34,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:41:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:41:34,122 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:41:34,123 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:41:34,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:41:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:41:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:41:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:41:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:41:34,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:41:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:41:34,132 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:41:34,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:41:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:41:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:41:34,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:34,134 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:34,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:41:34,346 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:34,346 INFO L82 PathProgramCache]: Analyzing trace with hash 293651941, now seen corresponding path program 1 times [2019-11-24 05:41:34,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:34,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810682651] [2019-11-24 05:41:34,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:41:34,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810682651] [2019-11-24 05:41:34,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490790124] [2019-11-24 05:41:34,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:41:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:34,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:41:34,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:41:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:41:34,473 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:41:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:41:34,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193885377] [2019-11-24 05:41:34,522 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:41:34,523 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:41:34,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:41:34,535 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:41:34,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:42:11,121 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 272 [2019-11-24 05:42:11,296 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 272 [2019-11-24 05:42:28,691 WARN L192 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 326 [2019-11-24 05:42:29,065 WARN L192 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 335 [2019-11-24 05:42:29,504 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-11-24 05:42:29,844 WARN L192 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 362 [2019-11-24 05:42:30,157 WARN L192 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 411 [2019-11-24 05:42:31,113 WARN L192 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 412 [2019-11-24 05:42:31,635 WARN L192 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 514 [2019-11-24 05:42:36,122 WARN L192 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 512 [2019-11-24 05:42:37,228 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 710 [2019-11-24 05:42:51,097 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8845 conjuctions. This might take some time... [2019-11-24 05:43:06,399 WARN L192 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 711 DAG size of output: 615 [2019-11-24 05:43:07,681 WARN L192 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 977