/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:15:14,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:15:14,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:15:14,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:15:14,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:15:14,242 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:15:14,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:15:14,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:15:14,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:15:14,244 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:15:14,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:15:14,247 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:15:14,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:15:14,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:15:14,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:15:14,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:15:14,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:15:14,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:15:14,248 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:15:14,249 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:15:14,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:15:14,249 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:15:14,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:15:14,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:15:14,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:15:14,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:15:14,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:15:14,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:15:14,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:15:14,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:15:14,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:15:14,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:15:14,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:15:14,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:15:14,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:15:14,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:15:14,540 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:15:14,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:15:14,545 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:15:14,545 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:15:14,546 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2019-11-23 22:15:14,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6636a9d4b/b2d641de25194a7392d66d51a138f587/FLAG80ab8f764 [2019-11-23 22:15:14,977 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:15:14,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2019-11-23 22:15:14,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6636a9d4b/b2d641de25194a7392d66d51a138f587/FLAG80ab8f764 [2019-11-23 22:15:15,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6636a9d4b/b2d641de25194a7392d66d51a138f587 [2019-11-23 22:15:15,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:15:15,420 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:15:15,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:15,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:15:15,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:15:15,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,428 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 10:15:15, skipping insertion in model container [2019-11-23 22:15:15,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:15:15,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:15:15,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:15,601 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:15:15,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:15,628 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:15:15,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15 WrapperNode [2019-11-23 22:15:15,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:15,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:15,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:15:15,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:15:15,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:15,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:15:15,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:15:15,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:15:15,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (1/1) ... [2019-11-23 22:15:15,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:15:15,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:15:15,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:15:15,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:15:15,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (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 22:15:15,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:15:15,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:15:16,057 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:15:16,057 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:15:16,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:16 BoogieIcfgContainer [2019-11-23 22:15:16,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:15:16,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:15:16,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:15:16,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:15:16,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:15:15" (1/3) ... [2019-11-23 22:15:16,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3d3a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:16, skipping insertion in model container [2019-11-23 22:15:16,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:15" (2/3) ... [2019-11-23 22:15:16,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3d3a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:16, skipping insertion in model container [2019-11-23 22:15:16,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:16" (3/3) ... [2019-11-23 22:15:16,069 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-11-23 22:15:16,079 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:15:16,087 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:15:16,099 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:15:16,133 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:15:16,134 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:15:16,134 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:15:16,134 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:15:16,134 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:15:16,135 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:15:16,135 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:15:16,135 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:15:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:15:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:15:16,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:16,159 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:15:16,160 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:16,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:16,167 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-11-23 22:15:16,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:16,177 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469098096] [2019-11-23 22:15:16,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:16,325 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 22:15:16,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469098096] [2019-11-23 22:15:16,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:16,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:15:16,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851566487] [2019-11-23 22:15:16,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:15:16,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:16,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:15:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:15:16,355 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-11-23 22:15:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:16,370 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-11-23 22:15:16,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:15:16,371 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-23 22:15:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:16,378 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:15:16,378 INFO L226 Difference]: Without dead ends: 8 [2019-11-23 22:15:16,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:15:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-23 22:15:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-23 22:15:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-23 22:15:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-23 22:15:16,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-23 22:15:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:16,410 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-23 22:15:16,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:15:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-23 22:15:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:15:16,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:16,411 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:15:16,412 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:16,412 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2019-11-23 22:15:16,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:16,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65936213] [2019-11-23 22:15:16,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:16,475 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 22:15:16,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65936213] [2019-11-23 22:15:16,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:16,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:15:16,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368200993] [2019-11-23 22:15:16,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:15:16,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:16,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:15:16,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:15:16,478 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-11-23 22:15:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:16,571 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-11-23 22:15:16,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:15:16,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-23 22:15:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:16,573 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:15:16,573 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:15:16,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:15:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:15:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:15:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:15:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-23 22:15:16,579 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2019-11-23 22:15:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:16,579 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-23 22:15:16,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:15:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-23 22:15:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:15:16,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:16,581 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:16,581 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:16,582 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2019-11-23 22:15:16,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:16,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163866214] [2019-11-23 22:15:16,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:16,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163866214] [2019-11-23 22:15:16,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520701564] [2019-11-23 22:15:16,869 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 22:15:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:16,919 WARN L253 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:15:16,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:17,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:17,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:17,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-23 22:15:17,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307491224] [2019-11-23 22:15:17,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:15:17,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:17,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:15:17,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:15:17,094 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 14 states. [2019-11-23 22:15:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:17,389 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-11-23 22:15:17,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:15:17,390 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2019-11-23 22:15:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:17,391 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:15:17,391 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:15:17,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:15:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:15:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-11-23 22:15:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:15:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-23 22:15:17,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2019-11-23 22:15:17,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:17,402 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-23 22:15:17,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:15:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-23 22:15:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:15:17,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:17,404 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2019-11-23 22:15:17,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:17,607 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:17,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1111984220, now seen corresponding path program 2 times [2019-11-23 22:15:17,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:17,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762324849] [2019-11-23 22:15:17,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:15:17,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762324849] [2019-11-23 22:15:17,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786959183] [2019-11-23 22:15:17,840 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 22:15:17,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:17,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:17,873 WARN L253 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:15:17,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:18,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:15:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:18,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:18,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2019-11-23 22:15:18,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189712374] [2019-11-23 22:15:18,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:15:18,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:18,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:15:18,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:15:18,104 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 19 states. [2019-11-23 22:15:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:18,656 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-11-23 22:15:18,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:15:18,657 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2019-11-23 22:15:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:18,657 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:15:18,658 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:15:18,659 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:15:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:15:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-23 22:15:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:15:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-23 22:15:18,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-23 22:15:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:18,666 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-23 22:15:18,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:15:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-23 22:15:18,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:15:18,669 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:18,669 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:18,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:18,870 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:18,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1125442374, now seen corresponding path program 1 times [2019-11-23 22:15:18,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:18,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215010673] [2019-11-23 22:15:18,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:18,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215010673] [2019-11-23 22:15:18,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372817061] [2019-11-23 22:15:18,948 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 [2019-11-23 22:15:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:18,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:15:18,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:18,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:18,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-23 22:15:18,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723432735] [2019-11-23 22:15:18,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:15:18,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:18,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:15:18,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:15:18,979 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2019-11-23 22:15:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:19,008 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-23 22:15:19,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:15:19,009 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-23 22:15:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:19,009 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:15:19,009 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:15:19,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:15:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:15:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-23 22:15:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:15:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-23 22:15:19,016 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2019-11-23 22:15:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:19,016 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-23 22:15:19,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:15:19,016 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-23 22:15:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:15:19,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:19,017 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:19,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:19,221 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:19,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:19,222 INFO L82 PathProgramCache]: Analyzing trace with hash -622858099, now seen corresponding path program 2 times [2019-11-23 22:15:19,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:19,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293587658] [2019-11-23 22:15:19,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:19,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293587658] [2019-11-23 22:15:19,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857714054] [2019-11-23 22:15:19,294 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:19,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:19,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:19,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:15:19,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:19,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:19,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-23 22:15:19,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841646716] [2019-11-23 22:15:19,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:15:19,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:19,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:15:19,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:15:19,337 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2019-11-23 22:15:19,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:19,390 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-11-23 22:15:19,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:15:19,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-23 22:15:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:19,396 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:15:19,396 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:15:19,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:15:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:15:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:15:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:15:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 22:15:19,401 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-11-23 22:15:19,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:19,402 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 22:15:19,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:15:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 22:15:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:15:19,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:19,403 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:19,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:19,606 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:19,606 INFO L82 PathProgramCache]: Analyzing trace with hash -390715430, now seen corresponding path program 3 times [2019-11-23 22:15:19,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:19,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062894721] [2019-11-23 22:15:19,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:19,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062894721] [2019-11-23 22:15:19,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632129125] [2019-11-23 22:15:19,698 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:19,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:15:19,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:19,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:15:19,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:19,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:19,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-23 22:15:19,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264782418] [2019-11-23 22:15:19,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:15:19,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:19,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:15:19,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:15:19,760 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2019-11-23 22:15:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:19,799 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-11-23 22:15:19,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:15:19,799 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-11-23 22:15:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:19,801 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:15:19,801 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:15:19,801 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:15:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:15:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-23 22:15:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:15:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-23 22:15:19,807 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2019-11-23 22:15:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:19,807 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-23 22:15:19,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:15:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-23 22:15:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:15:19,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:19,808 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:20,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:20,015 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:20,016 INFO L82 PathProgramCache]: Analyzing trace with hash 474190189, now seen corresponding path program 4 times [2019-11-23 22:15:20,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:20,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083147797] [2019-11-23 22:15:20,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:20,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083147797] [2019-11-23 22:15:20,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445826574] [2019-11-23 22:15:20,129 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:20,152 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:15:20,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:20,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:15:20,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:20,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:20,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-23 22:15:20,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125996678] [2019-11-23 22:15:20,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:15:20,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:15:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:15:20,165 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2019-11-23 22:15:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:20,245 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-23 22:15:20,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:15:20,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-11-23 22:15:20,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:20,251 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:15:20,251 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:15:20,251 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:15:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:15:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-23 22:15:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:15:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-23 22:15:20,257 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-11-23 22:15:20,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:20,257 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-23 22:15:20,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:15:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-23 22:15:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:15:20,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:20,258 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:20,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:20,464 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1368677114, now seen corresponding path program 5 times [2019-11-23 22:15:20,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:20,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448288149] [2019-11-23 22:15:20,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:20,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448288149] [2019-11-23 22:15:20,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616386479] [2019-11-23 22:15:20,563 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:20,591 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 22:15:20,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:20,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:15:20,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:20,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:20,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-23 22:15:20,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780422360] [2019-11-23 22:15:20,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:15:20,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:20,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:15:20,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:15:20,604 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2019-11-23 22:15:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:20,667 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-11-23 22:15:20,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:15:20,667 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-11-23 22:15:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:20,668 INFO L225 Difference]: With dead ends: 45 [2019-11-23 22:15:20,668 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:15:20,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:15:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:15:20,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 22:15:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:15:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-23 22:15:20,674 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2019-11-23 22:15:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:20,674 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-23 22:15:20,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:15:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-23 22:15:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 22:15:20,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:20,676 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:20,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:20,880 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:20,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1243411891, now seen corresponding path program 6 times [2019-11-23 22:15:20,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:20,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935237342] [2019-11-23 22:15:20,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:15:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:15:20,951 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-23 22:15:20,951 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-23 22:15:20,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:15:20 BoogieIcfgContainer [2019-11-23 22:15:20,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-23 22:15:20,985 INFO L168 Benchmark]: Toolchain (without parser) took 5564.35 ms. Allocated memory was 147.3 MB in the beginning and 242.7 MB in the end (delta: 95.4 MB). Free memory was 105.1 MB in the beginning and 176.1 MB in the end (delta: -71.1 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:20,990 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 147.3 MB. Free memory was 123.7 MB in the beginning and 123.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-11-23 22:15:20,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.18 ms. Allocated memory is still 147.3 MB. Free memory was 104.8 MB in the beginning and 95.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:20,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 120.77 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 95.6 MB in the beginning and 183.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:20,992 INFO L168 Benchmark]: Boogie Preprocessor took 25.94 ms. Allocated memory is still 204.5 MB. Free memory was 183.8 MB in the beginning and 182.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:20,997 INFO L168 Benchmark]: RCFGBuilder took 282.43 ms. Allocated memory is still 204.5 MB. Free memory was 182.1 MB in the beginning and 172.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:20,999 INFO L168 Benchmark]: TraceAbstraction took 4923.56 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 171.4 MB in the beginning and 176.1 MB in the end (delta: -4.8 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:21,007 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 147.3 MB. Free memory was 123.7 MB in the beginning and 123.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 207.18 ms. Allocated memory is still 147.3 MB. Free memory was 104.8 MB in the beginning and 95.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 120.77 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 95.6 MB in the beginning and 183.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.94 ms. Allocated memory is still 204.5 MB. Free memory was 183.8 MB in the beginning and 182.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 282.43 ms. Allocated memory is still 204.5 MB. Free memory was 182.1 MB in the beginning and 172.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4923.56 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 171.4 MB in the beginning and 176.1 MB in the end (delta: -4.8 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.8s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 71 SDslu, 141 SDs, 0 SdLazy, 487 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 349 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 21242 SizeOfPredicates, 15 NumberOfNonLiveVariables, 336 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 135/756 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...