/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/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:15:28,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:15:28,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:15:28,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:15:28,306 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 22:15:28,319 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:15:28,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:15:28,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:15:28,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:15:28,321 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:15:28,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:15:28,321 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:15:28,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:15:28,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:15:28,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:15:28,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:15:28,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:15:28,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:15:28,323 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:15:28,323 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:15:28,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:15:28,323 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:15:28,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:15:28,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:15:28,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:15:28,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:15:28,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:15:28,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:15:28,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:15:28,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:15:28,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:15:28,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:15:28,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:15:28,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:15:28,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:15:28,590 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:15:28,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:15:28,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:15:28,606 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:15:28,607 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:15:28,607 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2019-11-23 22:15:28,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236dbd628/6408e5d714014860964a8dd0b130e5d7/FLAG5d69db57d [2019-11-23 22:15:29,070 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:15:29,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2019-11-23 22:15:29,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236dbd628/6408e5d714014860964a8dd0b130e5d7/FLAG5d69db57d [2019-11-23 22:15:29,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/236dbd628/6408e5d714014860964a8dd0b130e5d7 [2019-11-23 22:15:29,459 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:15:29,463 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:15:29,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:29,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:15:29,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:15:29,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28facf1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29, skipping insertion in model container [2019-11-23 22:15:29,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:15:29,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:15:29,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:29,721 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:15:29,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:15:29,757 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:15:29,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29 WrapperNode [2019-11-23 22:15:29,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:15:29,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:29,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:15:29,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:15:29,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,795 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:15:29,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:15:29,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:15:29,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:15:29,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (1/1) ... [2019-11-23 22:15:29,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:15:29,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:15:29,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:15:29,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:15:29,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (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 22:15:29,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:15:29,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:15:30,139 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:15:30,139 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:15:30,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:30 BoogieIcfgContainer [2019-11-23 22:15:30,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:15:30,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:15:30,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:15:30,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:15:30,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:15:29" (1/3) ... [2019-11-23 22:15:30,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2f8cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:30, skipping insertion in model container [2019-11-23 22:15:30,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:15:29" (2/3) ... [2019-11-23 22:15:30,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2f8cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:15:30, skipping insertion in model container [2019-11-23 22:15:30,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:15:30" (3/3) ... [2019-11-23 22:15:30,149 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2019-11-23 22:15:30,159 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:15:30,166 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:15:30,178 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:15:30,203 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:15:30,203 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:15:30,203 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:15:30,203 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:15:30,204 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:15:30,204 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:15:30,204 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:15:30,204 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:15:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:15:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:15:30,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:30,226 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:15:30,226 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:30,231 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-11-23 22:15:30,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:30,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772294440] [2019-11-23 22:15:30,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:30,324 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 22:15:30,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772294440] [2019-11-23 22:15:30,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:30,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:15:30,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764161270] [2019-11-23 22:15:30,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:15:30,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:30,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:15:30,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:15:30,349 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-11-23 22:15:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:30,366 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-11-23 22:15:30,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:15:30,368 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-23 22:15:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:30,378 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:15:30,378 INFO L226 Difference]: Without dead ends: 8 [2019-11-23 22:15:30,381 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 22:15:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-23 22:15:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-23 22:15:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-23 22:15:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-23 22:15:30,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-23 22:15:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:30,417 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-23 22:15:30,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:15:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-23 22:15:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-23 22:15:30,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:30,418 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-23 22:15:30,419 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2019-11-23 22:15:30,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:30,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588901861] [2019-11-23 22:15:30,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:30,453 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 22:15:30,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588901861] [2019-11-23 22:15:30,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:15:30,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:15:30,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560546959] [2019-11-23 22:15:30,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:15:30,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:30,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:15:30,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:15:30,457 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2019-11-23 22:15:30,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:30,483 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2019-11-23 22:15:30,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:15:30,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-23 22:15:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:30,484 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:15:30,484 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:15:30,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:15:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:15:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-23 22:15:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:15:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-23 22:15:30,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2019-11-23 22:15:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:30,490 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-23 22:15:30,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:15:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-23 22:15:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:15:30,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:30,491 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:30,491 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2019-11-23 22:15:30,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:30,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161537774] [2019-11-23 22:15:30,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:30,549 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 22:15:30,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161537774] [2019-11-23 22:15:30,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152140088] [2019-11-23 22:15:30,554 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 22:15:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:30,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:15:30,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:30,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:15:30,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2019-11-23 22:15:30,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653226877] [2019-11-23 22:15:30,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:15:30,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:30,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:15:30,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:30,799 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2019-11-23 22:15:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:30,833 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2019-11-23 22:15:30,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:15:30,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-23 22:15:30,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:30,835 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:15:30,835 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:15:30,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:15:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2019-11-23 22:15:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:15:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-23 22:15:30,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2019-11-23 22:15:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:30,841 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-23 22:15:30,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:15:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-23 22:15:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:15:30,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:30,842 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:31,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:31,047 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1722534195, now seen corresponding path program 1 times [2019-11-23 22:15:31,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:31,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729952384] [2019-11-23 22:15:31,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:31,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729952384] [2019-11-23 22:15:31,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292700712] [2019-11-23 22:15:31,088 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 [2019-11-23 22:15:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:31,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:15:31,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:31,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:31,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-23 22:15:31,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110163170] [2019-11-23 22:15:31,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:15:31,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:31,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:15:31,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:15:31,140 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2019-11-23 22:15:31,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:31,184 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2019-11-23 22:15:31,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:15:31,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 22:15:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:31,186 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:15:31,187 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:15:31,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:15:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:15:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 22:15:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:15:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-23 22:15:31,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2019-11-23 22:15:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:31,196 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-23 22:15:31,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:15:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-23 22:15:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:15:31,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:31,197 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:31,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:31,402 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1169242522, now seen corresponding path program 2 times [2019-11-23 22:15:31,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:31,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634172445] [2019-11-23 22:15:31,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:31,468 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 22:15:31,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634172445] [2019-11-23 22:15:31,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740001420] [2019-11-23 22:15:31,469 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-23 22:15:31,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:15:31,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:31,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:15:31,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:31,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:31,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-11-23 22:15:31,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759214913] [2019-11-23 22:15:31,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:15:31,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:31,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:15:31,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:31,520 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2019-11-23 22:15:31,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:31,577 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-11-23 22:15:31,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:15:31,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-23 22:15:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:31,580 INFO L225 Difference]: With dead ends: 29 [2019-11-23 22:15:31,580 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:15:31,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:15:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:15:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-23 22:15:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:15:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-23 22:15:31,585 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-11-23 22:15:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:31,586 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-23 22:15:31,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:15:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-23 22:15:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:15:31,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:31,587 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2019-11-23 22:15:31,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:31,791 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:31,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1635395501, now seen corresponding path program 3 times [2019-11-23 22:15:31,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:31,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942294001] [2019-11-23 22:15:31,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:31,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942294001] [2019-11-23 22:15:31,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741353784] [2019-11-23 22:15:31,882 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 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 22:15:31,905 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:15:31,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:31,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:15:31,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:15:31,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:31,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-23 22:15:31,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034836992] [2019-11-23 22:15:31,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:15:31,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:31,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:15:31,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:15:31,927 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-11-23 22:15:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:31,977 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-11-23 22:15:31,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:15:31,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-23 22:15:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:31,989 INFO L225 Difference]: With dead ends: 27 [2019-11-23 22:15:31,989 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:15:31,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:15:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:15:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-11-23 22:15:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:15:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 22:15:31,998 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2019-11-23 22:15:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:31,998 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 22:15:31,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:15:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 22:15:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:15:32,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:32,001 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1] [2019-11-23 22:15:32,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:32,209 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:32,210 INFO L82 PathProgramCache]: Analyzing trace with hash -445384004, now seen corresponding path program 4 times [2019-11-23 22:15:32,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:32,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069048713] [2019-11-23 22:15:32,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:15:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:15:32,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069048713] [2019-11-23 22:15:32,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429749104] [2019-11-23 22:15:32,315 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 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 22:15:32,346 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:15:32,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:15:32,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:15:32,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:15:32,406 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 22:15:32,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:15:32,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2019-11-23 22:15:32,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213570563] [2019-11-23 22:15:32,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:15:32,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:15:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:15:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:15:32,409 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2019-11-23 22:15:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:15:32,491 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-11-23 22:15:32,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:15:32,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-23 22:15:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:15:32,494 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:15:32,494 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:15:32,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:15:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:15:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 22:15:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:15:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-23 22:15:32,502 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2019-11-23 22:15:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:15:32,503 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-23 22:15:32,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:15:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-23 22:15:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:15:32,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:15:32,504 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1] [2019-11-23 22:15:32,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:15:32,709 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:15:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:15:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1861594387, now seen corresponding path program 5 times [2019-11-23 22:15:32,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:15:32,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126033888] [2019-11-23 22:15:32,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:15:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:15:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 22:15:32,773 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-23 22:15:32,774 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-23 22:15:32,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 10:15:32 BoogieIcfgContainer [2019-11-23 22:15:32,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-23 22:15:32,796 INFO L168 Benchmark]: Toolchain (without parser) took 3334.54 ms. Allocated memory was 142.1 MB in the beginning and 234.4 MB in the end (delta: 92.3 MB). Free memory was 103.0 MB in the beginning and 174.7 MB in the end (delta: -71.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:32,797 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-11-23 22:15:32,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.99 ms. Allocated memory is still 142.1 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:32,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.92 ms. Allocated memory is still 142.1 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:32,800 INFO L168 Benchmark]: Boogie Preprocessor took 115.49 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 182.4 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:32,800 INFO L168 Benchmark]: RCFGBuilder took 229.92 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 172.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:32,801 INFO L168 Benchmark]: TraceAbstraction took 2651.12 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 171.3 MB in the beginning and 174.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2019-11-23 22:15:32,806 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.99 ms. Allocated memory is still 142.1 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.92 ms. Allocated memory is still 142.1 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.49 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 92.1 MB in the beginning and 182.4 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 229.92 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 172.0 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2651.12 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 171.3 MB in the beginning and 174.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 27.0 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, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.5s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 46 SDslu, 57 SDs, 0 SdLazy, 113 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=7, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 179 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 138 ConstructedInterpolants, 0 QuantifiedInterpolants, 4378 SizeOfPredicates, 4 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 41/150 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...