/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/eca-rers2012/Problem12_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:07:39,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:07:39,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:07:39,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:07:39,783 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 21:07:39,796 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:07:39,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:07:39,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:07:39,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:07:39,798 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:07:39,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:07:39,798 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:07:39,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:07:39,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:07:39,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:07:39,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:07:39,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:07:39,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:07:39,800 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:07:39,800 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:07:39,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:07:39,800 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:07:39,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:07:39,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:07:39,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:07:39,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:07:39,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:07:39,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:07:39,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:07:39,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:07:39,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:07:39,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:07:39,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:07:39,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:07:39,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:07:40,073 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:07:40,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:07:40,094 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:07:40,096 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:07:40,096 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:07:40,097 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label20.c [2019-11-23 21:07:40,169 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afd39365b/0bdf2282bfa742b98c72a800b569b418/FLAG899041a4f [2019-11-23 21:07:41,025 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:07:41,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label20.c [2019-11-23 21:07:41,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afd39365b/0bdf2282bfa742b98c72a800b569b418/FLAG899041a4f [2019-11-23 21:07:41,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afd39365b/0bdf2282bfa742b98c72a800b569b418 [2019-11-23 21:07:41,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:07:41,567 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:07:41,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:07:41,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:07:41,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:07:41,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:41" (1/1) ... [2019-11-23 21:07:41,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63348866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:41, skipping insertion in model container [2019-11-23 21:07:41,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:41" (1/1) ... [2019-11-23 21:07:41,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:07:41,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:07:43,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:07:43,234 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:07:43,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:07:43,849 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:07:43,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43 WrapperNode [2019-11-23 21:07:43,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:07:43,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:07:43,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:07:43,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:07:43,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (1/1) ... [2019-11-23 21:07:43,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (1/1) ... [2019-11-23 21:07:44,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:07:44,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:07:44,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:07:44,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:07:44,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (1/1) ... [2019-11-23 21:07:44,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (1/1) ... [2019-11-23 21:07:44,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (1/1) ... [2019-11-23 21:07:44,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (1/1) ... [2019-11-23 21:07:44,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (1/1) ... [2019-11-23 21:07:44,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (1/1) ... [2019-11-23 21:07:44,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (1/1) ... [2019-11-23 21:07:44,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:07:44,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:07:44,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:07:44,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:07:44,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (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 21:07:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:07:44,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:07:50,413 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:07:50,413 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 21:07:50,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:07:50 BoogieIcfgContainer [2019-11-23 21:07:50,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:07:50,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:07:50,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:07:50,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:07:50,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:07:41" (1/3) ... [2019-11-23 21:07:50,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b93cb79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:07:50, skipping insertion in model container [2019-11-23 21:07:50,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:43" (2/3) ... [2019-11-23 21:07:50,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b93cb79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:07:50, skipping insertion in model container [2019-11-23 21:07:50,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:07:50" (3/3) ... [2019-11-23 21:07:50,428 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label20.c [2019-11-23 21:07:50,437 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:07:50,447 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:07:50,457 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:07:50,503 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:07:50,503 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:07:50,503 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:07:50,503 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:07:50,503 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:07:50,504 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:07:50,504 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:07:50,504 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:07:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2019-11-23 21:07:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 21:07:50,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:50,544 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:50,544 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:50,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash -569068670, now seen corresponding path program 1 times [2019-11-23 21:07:50,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:50,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167715832] [2019-11-23 21:07:50,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:50,781 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 21:07:50,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167715832] [2019-11-23 21:07:50,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:50,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:07:50,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267662026] [2019-11-23 21:07:50,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:50,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:50,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:50,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:50,808 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 4 states. [2019-11-23 21:08:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:00,830 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2019-11-23 21:08:00,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:08:00,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 21:08:00,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:00,866 INFO L225 Difference]: With dead ends: 3142 [2019-11-23 21:08:00,866 INFO L226 Difference]: Without dead ends: 2257 [2019-11-23 21:08:00,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:08:00,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2019-11-23 21:08:01,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2019-11-23 21:08:01,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2257 states. [2019-11-23 21:08:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3733 transitions. [2019-11-23 21:08:01,020 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3733 transitions. Word has length 12 [2019-11-23 21:08:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:01,020 INFO L462 AbstractCegarLoop]: Abstraction has 2257 states and 3733 transitions. [2019-11-23 21:08:01,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:08:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3733 transitions. [2019-11-23 21:08:01,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 21:08:01,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:01,024 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:08:01,024 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:01,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1960193691, now seen corresponding path program 1 times [2019-11-23 21:08:01,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:01,025 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504765112] [2019-11-23 21:08:01,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:08:01,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504765112] [2019-11-23 21:08:01,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:08:01,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:08:01,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836889578] [2019-11-23 21:08:01,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:08:01,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:08:01,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:08:01,267 INFO L87 Difference]: Start difference. First operand 2257 states and 3733 transitions. Second operand 4 states. [2019-11-23 21:08:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:08,390 INFO L93 Difference]: Finished difference Result 9018 states and 14924 transitions. [2019-11-23 21:08:08,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:08:08,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2019-11-23 21:08:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:08,426 INFO L225 Difference]: With dead ends: 9018 [2019-11-23 21:08:08,427 INFO L226 Difference]: Without dead ends: 6763 [2019-11-23 21:08:08,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 21:08:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2019-11-23 21:08:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2019-11-23 21:08:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6763 states. [2019-11-23 21:08:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9656 transitions. [2019-11-23 21:08:08,566 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9656 transitions. Word has length 86 [2019-11-23 21:08:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:08,567 INFO L462 AbstractCegarLoop]: Abstraction has 6763 states and 9656 transitions. [2019-11-23 21:08:08,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:08:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9656 transitions. [2019-11-23 21:08:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 21:08:08,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:08,579 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:08:08,579 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:08,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1909413579, now seen corresponding path program 1 times [2019-11-23 21:08:08,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:08,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981746425] [2019-11-23 21:08:08,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:08:08,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981746425] [2019-11-23 21:08:08,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:08:08,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:08:08,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009105917] [2019-11-23 21:08:08,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:08:08,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:08,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:08:08,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:08:08,773 INFO L87 Difference]: Start difference. First operand 6763 states and 9656 transitions. Second operand 4 states. [2019-11-23 21:08:17,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:17,391 INFO L93 Difference]: Finished difference Result 27042 states and 38616 transitions. [2019-11-23 21:08:17,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:08:17,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2019-11-23 21:08:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:17,542 INFO L225 Difference]: With dead ends: 27042 [2019-11-23 21:08:17,542 INFO L226 Difference]: Without dead ends: 20281 [2019-11-23 21:08:17,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:08:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20281 states. [2019-11-23 21:08:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20281 to 13522. [2019-11-23 21:08:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13522 states. [2019-11-23 21:08:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13522 states to 13522 states and 17411 transitions. [2019-11-23 21:08:17,848 INFO L78 Accepts]: Start accepts. Automaton has 13522 states and 17411 transitions. Word has length 111 [2019-11-23 21:08:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:17,849 INFO L462 AbstractCegarLoop]: Abstraction has 13522 states and 17411 transitions. [2019-11-23 21:08:17,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:08:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 13522 states and 17411 transitions. [2019-11-23 21:08:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-23 21:08:17,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:17,858 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:08:17,861 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:17,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1465929056, now seen corresponding path program 1 times [2019-11-23 21:08:17,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:17,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368847025] [2019-11-23 21:08:17,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 21:08:17,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368847025] [2019-11-23 21:08:17,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:08:17,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:08:17,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288910160] [2019-11-23 21:08:17,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:08:17,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:08:17,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:08:17,998 INFO L87 Difference]: Start difference. First operand 13522 states and 17411 transitions. Second operand 4 states. [2019-11-23 21:08:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:25,375 INFO L93 Difference]: Finished difference Result 51827 states and 67192 transitions. [2019-11-23 21:08:25,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:08:25,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2019-11-23 21:08:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:25,429 INFO L225 Difference]: With dead ends: 51827 [2019-11-23 21:08:25,429 INFO L226 Difference]: Without dead ends: 38307 [2019-11-23 21:08:25,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 21:08:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38307 states. [2019-11-23 21:08:25,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38307 to 24036. [2019-11-23 21:08:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24036 states. [2019-11-23 21:08:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 29811 transitions. [2019-11-23 21:08:25,817 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 29811 transitions. Word has length 162 [2019-11-23 21:08:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:25,817 INFO L462 AbstractCegarLoop]: Abstraction has 24036 states and 29811 transitions. [2019-11-23 21:08:25,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:08:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 29811 transitions. [2019-11-23 21:08:25,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-23 21:08:25,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:25,821 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:08:25,821 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:25,821 INFO L82 PathProgramCache]: Analyzing trace with hash 118434562, now seen corresponding path program 1 times [2019-11-23 21:08:25,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:25,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913561196] [2019-11-23 21:08:25,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-23 21:08:26,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913561196] [2019-11-23 21:08:26,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:08:26,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:08:26,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211845555] [2019-11-23 21:08:26,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:08:26,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:08:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:08:26,048 INFO L87 Difference]: Start difference. First operand 24036 states and 29811 transitions. Second operand 4 states. [2019-11-23 21:08:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:33,214 INFO L93 Difference]: Finished difference Result 86371 states and 107955 transitions. [2019-11-23 21:08:33,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:08:33,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2019-11-23 21:08:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:33,386 INFO L225 Difference]: With dead ends: 86371 [2019-11-23 21:08:33,387 INFO L226 Difference]: Without dead ends: 62337 [2019-11-23 21:08:33,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 21:08:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62337 states. [2019-11-23 21:08:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62337 to 60084. [2019-11-23 21:08:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60084 states. [2019-11-23 21:08:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60084 states to 60084 states and 73575 transitions. [2019-11-23 21:08:34,324 INFO L78 Accepts]: Start accepts. Automaton has 60084 states and 73575 transitions. Word has length 225 [2019-11-23 21:08:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:34,325 INFO L462 AbstractCegarLoop]: Abstraction has 60084 states and 73575 transitions. [2019-11-23 21:08:34,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:08:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 60084 states and 73575 transitions. [2019-11-23 21:08:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2019-11-23 21:08:34,332 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:34,332 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:08:34,332 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:34,333 INFO L82 PathProgramCache]: Analyzing trace with hash -186991484, now seen corresponding path program 1 times [2019-11-23 21:08:34,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:34,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088889421] [2019-11-23 21:08:34,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 189 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 21:08:34,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088889421] [2019-11-23 21:08:34,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012393947] [2019-11-23 21:08:34,676 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 21:08:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:34,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:08:34,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:08:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2019-11-23 21:08:34,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:08:34,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:08:34,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679590066] [2019-11-23 21:08:34,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:08:34,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:08:34,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:08:34,987 INFO L87 Difference]: Start difference. First operand 60084 states and 73575 transitions. Second operand 3 states. [2019-11-23 21:08:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:41,222 INFO L93 Difference]: Finished difference Result 122419 states and 150127 transitions. [2019-11-23 21:08:41,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:08:41,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 277 [2019-11-23 21:08:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:41,463 INFO L225 Difference]: With dead ends: 122419 [2019-11-23 21:08:41,464 INFO L226 Difference]: Without dead ends: 62337 [2019-11-23 21:08:41,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 276 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:08:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62337 states. [2019-11-23 21:08:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62337 to 61586. [2019-11-23 21:08:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61586 states. [2019-11-23 21:08:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61586 states to 61586 states and 71223 transitions. [2019-11-23 21:08:42,723 INFO L78 Accepts]: Start accepts. Automaton has 61586 states and 71223 transitions. Word has length 277 [2019-11-23 21:08:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:42,723 INFO L462 AbstractCegarLoop]: Abstraction has 61586 states and 71223 transitions. [2019-11-23 21:08:42,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:08:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 61586 states and 71223 transitions. [2019-11-23 21:08:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-11-23 21:08:42,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:42,741 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:08:42,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:42,950 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:42,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1544053184, now seen corresponding path program 1 times [2019-11-23 21:08:42,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:42,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582421220] [2019-11-23 21:08:42,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 289 proven. 4 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 21:08:43,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582421220] [2019-11-23 21:08:43,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509916585] [2019-11-23 21:08:43,405 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 21:08:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:43,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 21:08:43,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:08:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 293 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 21:08:43,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:08:43,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-23 21:08:43,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187734863] [2019-11-23 21:08:43,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:08:43,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:43,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:08:43,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:08:43,925 INFO L87 Difference]: Start difference. First operand 61586 states and 71223 transitions. Second operand 3 states. [2019-11-23 21:08:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:47,160 INFO L93 Difference]: Finished difference Result 123207 states and 142481 transitions. [2019-11-23 21:08:47,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:08:47,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2019-11-23 21:08:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:47,317 INFO L225 Difference]: With dead ends: 123207 [2019-11-23 21:08:47,318 INFO L226 Difference]: Without dead ends: 61586 [2019-11-23 21:08:47,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 334 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:08:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61586 states. [2019-11-23 21:08:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61586 to 61586. [2019-11-23 21:08:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61586 states. [2019-11-23 21:08:48,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61586 states to 61586 states and 69397 transitions. [2019-11-23 21:08:48,421 INFO L78 Accepts]: Start accepts. Automaton has 61586 states and 69397 transitions. Word has length 334 [2019-11-23 21:08:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:48,421 INFO L462 AbstractCegarLoop]: Abstraction has 61586 states and 69397 transitions. [2019-11-23 21:08:48,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:08:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 61586 states and 69397 transitions. [2019-11-23 21:08:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2019-11-23 21:08:48,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:08:48,435 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:08:48,638 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:48,639 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:08:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:08:48,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1191328706, now seen corresponding path program 1 times [2019-11-23 21:08:48,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:08:48,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223179677] [2019-11-23 21:08:48,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:08:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 386 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 21:08:48,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223179677] [2019-11-23 21:08:48,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890899781] [2019-11-23 21:08:48,963 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 21:08:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:49,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:08:49,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:08:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-23 21:08:49,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:08:49,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-23 21:08:49,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247285346] [2019-11-23 21:08:49,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:08:49,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:49,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:08:49,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:08:49,197 INFO L87 Difference]: Start difference. First operand 61586 states and 69397 transitions. Second operand 3 states. [2019-11-23 21:08:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:55,064 INFO L93 Difference]: Finished difference Result 152459 states and 172833 transitions. [2019-11-23 21:08:55,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:08:55,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 383 [2019-11-23 21:08:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:55,169 INFO L225 Difference]: With dead ends: 152459 [2019-11-23 21:08:55,169 INFO L226 Difference]: Without dead ends: 90875 [2019-11-23 21:08:55,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 383 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:08:55,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90875 states.