/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem17_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:32:11,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:32:11,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:32:11,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:32:11,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:32:11,433 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:32:11,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:32:11,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:32:11,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:32:11,436 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:32:11,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:32:11,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:32:11,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:32:11,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:32:11,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:32:11,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:32:11,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:32:11,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:32:11,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:32:11,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:32:11,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:32:11,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:32:11,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:32:11,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:32:11,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:32:11,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:32:11,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:32:11,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:32:11,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:32:11,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:32:11,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:32:11,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:32:11,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:32:11,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:32:11,962 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:32:11,963 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:32:11,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label43.c [2020-12-22 02:32:12,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d8a9e13/08b8b36005b545ada65b3bae6260ab99/FLAG0203e29e6 [2020-12-22 02:32:13,190 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:32:13,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label43.c [2020-12-22 02:32:13,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d8a9e13/08b8b36005b545ada65b3bae6260ab99/FLAG0203e29e6 [2020-12-22 02:32:13,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d8a9e13/08b8b36005b545ada65b3bae6260ab99 [2020-12-22 02:32:13,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:32:13,667 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:32:13,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:32:13,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:32:13,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:32:13,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:32:13" (1/1) ... [2020-12-22 02:32:13,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561f746f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:13, skipping insertion in model container [2020-12-22 02:32:13,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:32:13" (1/1) ... [2020-12-22 02:32:13,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:32:13,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:32:14,233 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label43.c[9211,9224] [2020-12-22 02:32:14,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:32:14,961 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:32:14,996 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label43.c[9211,9224] [2020-12-22 02:32:15,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:32:15,508 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:32:15,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15 WrapperNode [2020-12-22 02:32:15,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:32:15,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:32:15,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:32:15,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:32:15,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... [2020-12-22 02:32:15,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... [2020-12-22 02:32:15,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:32:15,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:32:15,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:32:15,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:32:15,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... [2020-12-22 02:32:15,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... [2020-12-22 02:32:16,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... [2020-12-22 02:32:16,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... [2020-12-22 02:32:16,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... [2020-12-22 02:32:16,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... [2020-12-22 02:32:16,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... [2020-12-22 02:32:16,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:32:16,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:32:16,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:32:16,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:32:16,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:32:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:32:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:32:16,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:32:16,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:32:21,302 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:32:21,302 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:32:21,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:32:21 BoogieIcfgContainer [2020-12-22 02:32:21,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:32:21,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:32:21,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:32:21,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:32:21,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:32:13" (1/3) ... [2020-12-22 02:32:21,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad9e264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:32:21, skipping insertion in model container [2020-12-22 02:32:21,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:15" (2/3) ... [2020-12-22 02:32:21,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad9e264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:32:21, skipping insertion in model container [2020-12-22 02:32:21,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:32:21" (3/3) ... [2020-12-22 02:32:21,316 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label43.c [2020-12-22 02:32:21,323 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:32:21,330 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:32:21,352 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:32:21,386 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:32:21,387 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:32:21,387 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:32:21,387 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:32:21,387 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:32:21,387 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:32:21,387 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:32:21,387 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:32:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states. [2020-12-22 02:32:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 02:32:21,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:21,428 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 02:32:21,429 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:21,436 INFO L82 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2020-12-22 02:32:21,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:21,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120913722] [2020-12-22 02:32:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:32:21,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120913722] [2020-12-22 02:32:21,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:21,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:32:21,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506455151] [2020-12-22 02:32:21,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:21,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:21,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:21,873 INFO L87 Difference]: Start difference. First operand 590 states. Second operand 3 states. [2020-12-22 02:32:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:26,719 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2020-12-22 02:32:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:26,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 02:32:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:26,756 INFO L225 Difference]: With dead ends: 1680 [2020-12-22 02:32:26,757 INFO L226 Difference]: Without dead ends: 1011 [2020-12-22 02:32:26,767 INFO L677 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 [2020-12-22 02:32:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-12-22 02:32:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2020-12-22 02:32:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 996 states. [2020-12-22 02:32:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2020-12-22 02:32:26,964 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 62 [2020-12-22 02:32:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:26,965 INFO L481 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2020-12-22 02:32:26,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2020-12-22 02:32:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 02:32:26,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:26,976 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 02:32:26,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:32:26,977 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:26,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1373040103, now seen corresponding path program 1 times [2020-12-22 02:32:26,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:26,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938532312] [2020-12-22 02:32:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:32:27,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938532312] [2020-12-22 02:32:27,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:27,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:32:27,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842685634] [2020-12-22 02:32:27,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:27,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:27,276 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand 3 states. [2020-12-22 02:32:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:31,788 INFO L93 Difference]: Finished difference Result 2868 states and 5021 transitions. [2020-12-22 02:32:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:31,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 02:32:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:31,804 INFO L225 Difference]: With dead ends: 2868 [2020-12-22 02:32:31,804 INFO L226 Difference]: Without dead ends: 1874 [2020-12-22 02:32:31,807 INFO L677 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 [2020-12-22 02:32:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-12-22 02:32:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1865. [2020-12-22 02:32:31,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1865 states. [2020-12-22 02:32:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2832 transitions. [2020-12-22 02:32:31,870 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2832 transitions. Word has length 127 [2020-12-22 02:32:31,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:31,871 INFO L481 AbstractCegarLoop]: Abstraction has 1865 states and 2832 transitions. [2020-12-22 02:32:31,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2832 transitions. [2020-12-22 02:32:31,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 02:32:31,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:31,875 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 02:32:31,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:32:31,876 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1896986846, now seen corresponding path program 1 times [2020-12-22 02:32:31,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:31,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777024824] [2020-12-22 02:32:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:32:32,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777024824] [2020-12-22 02:32:32,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:32,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:32:32,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771360620] [2020-12-22 02:32:32,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:32,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:32,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:32,122 INFO L87 Difference]: Start difference. First operand 1865 states and 2832 transitions. Second operand 3 states. [2020-12-22 02:32:36,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:36,705 INFO L93 Difference]: Finished difference Result 5459 states and 8314 transitions. [2020-12-22 02:32:36,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:36,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2020-12-22 02:32:36,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:36,725 INFO L225 Difference]: With dead ends: 5459 [2020-12-22 02:32:36,726 INFO L226 Difference]: Without dead ends: 3596 [2020-12-22 02:32:36,729 INFO L677 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 [2020-12-22 02:32:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2020-12-22 02:32:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3164. [2020-12-22 02:32:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3164 states. [2020-12-22 02:32:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4305 transitions. [2020-12-22 02:32:36,808 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 4305 transitions. Word has length 129 [2020-12-22 02:32:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:36,809 INFO L481 AbstractCegarLoop]: Abstraction has 3164 states and 4305 transitions. [2020-12-22 02:32:36,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 4305 transitions. [2020-12-22 02:32:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 02:32:36,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:36,812 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 02:32:36,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:32:36,812 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:36,813 INFO L82 PathProgramCache]: Analyzing trace with hash -87517194, now seen corresponding path program 1 times [2020-12-22 02:32:36,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:36,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885812469] [2020-12-22 02:32:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:32:37,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885812469] [2020-12-22 02:32:37,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:37,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:32:37,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054602178] [2020-12-22 02:32:37,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:37,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:37,026 INFO L87 Difference]: Start difference. First operand 3164 states and 4305 transitions. Second operand 3 states. [2020-12-22 02:32:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:41,584 INFO L93 Difference]: Finished difference Result 8042 states and 11147 transitions. [2020-12-22 02:32:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:41,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 02:32:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:41,611 INFO L225 Difference]: With dead ends: 8042 [2020-12-22 02:32:41,612 INFO L226 Difference]: Without dead ends: 4880 [2020-12-22 02:32:41,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2020-12-22 02:32:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4877. [2020-12-22 02:32:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4877 states. [2020-12-22 02:32:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 6338 transitions. [2020-12-22 02:32:41,756 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 6338 transitions. Word has length 132 [2020-12-22 02:32:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:41,758 INFO L481 AbstractCegarLoop]: Abstraction has 4877 states and 6338 transitions. [2020-12-22 02:32:41,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:41,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 6338 transitions. [2020-12-22 02:32:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 02:32:41,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:41,765 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 02:32:41,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:32:41,765 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:41,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:41,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1657201363, now seen corresponding path program 1 times [2020-12-22 02:32:41,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:41,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302333013] [2020-12-22 02:32:41,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:32:42,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302333013] [2020-12-22 02:32:42,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:42,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:32:42,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666357433] [2020-12-22 02:32:42,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:42,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:42,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:42,061 INFO L87 Difference]: Start difference. First operand 4877 states and 6338 transitions. Second operand 3 states. [2020-12-22 02:32:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:46,542 INFO L93 Difference]: Finished difference Result 14435 states and 18745 transitions. [2020-12-22 02:32:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:46,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2020-12-22 02:32:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:46,585 INFO L225 Difference]: With dead ends: 14435 [2020-12-22 02:32:46,585 INFO L226 Difference]: Without dead ends: 7856 [2020-12-22 02:32:46,595 INFO L677 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 [2020-12-22 02:32:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7856 states. [2020-12-22 02:32:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7856 to 5724. [2020-12-22 02:32:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5724 states. [2020-12-22 02:32:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5724 states to 5724 states and 6850 transitions. [2020-12-22 02:32:46,756 INFO L78 Accepts]: Start accepts. Automaton has 5724 states and 6850 transitions. Word has length 173 [2020-12-22 02:32:46,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:46,757 INFO L481 AbstractCegarLoop]: Abstraction has 5724 states and 6850 transitions. [2020-12-22 02:32:46,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 5724 states and 6850 transitions. [2020-12-22 02:32:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-22 02:32:46,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:46,762 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:32:46,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:32:46,762 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1123333363, now seen corresponding path program 1 times [2020-12-22 02:32:46,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:46,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219987790] [2020-12-22 02:32:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:32:46,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219987790] [2020-12-22 02:32:46,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:46,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:32:46,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837904606] [2020-12-22 02:32:46,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:46,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:47,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:47,003 INFO L87 Difference]: Start difference. First operand 5724 states and 6850 transitions. Second operand 3 states. [2020-12-22 02:32:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:51,238 INFO L93 Difference]: Finished difference Result 14844 states and 18023 transitions. [2020-12-22 02:32:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:51,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 214 [2020-12-22 02:32:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:51,285 INFO L225 Difference]: With dead ends: 14844 [2020-12-22 02:32:51,285 INFO L226 Difference]: Without dead ends: 9122 [2020-12-22 02:32:51,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2020-12-22 02:32:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 9122. [2020-12-22 02:32:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9122 states. [2020-12-22 02:32:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 10688 transitions. [2020-12-22 02:32:51,477 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 10688 transitions. Word has length 214 [2020-12-22 02:32:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:51,478 INFO L481 AbstractCegarLoop]: Abstraction has 9122 states and 10688 transitions. [2020-12-22 02:32:51,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 10688 transitions. [2020-12-22 02:32:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-12-22 02:32:51,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:51,487 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:32:51,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:32:51,488 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1873248117, now seen corresponding path program 1 times [2020-12-22 02:32:51,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:51,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117175379] [2020-12-22 02:32:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-12-22 02:32:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117175379] [2020-12-22 02:32:51,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:51,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:32:51,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061883759] [2020-12-22 02:32:51,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:51,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:51,875 INFO L87 Difference]: Start difference. First operand 9122 states and 10688 transitions. Second operand 3 states. [2020-12-22 02:32:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:56,138 INFO L93 Difference]: Finished difference Result 22909 states and 27053 transitions. [2020-12-22 02:32:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:56,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 294 [2020-12-22 02:32:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:56,171 INFO L225 Difference]: With dead ends: 22909 [2020-12-22 02:32:56,172 INFO L226 Difference]: Without dead ends: 12939 [2020-12-22 02:32:56,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12939 states. [2020-12-22 02:32:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 12939. [2020-12-22 02:32:56,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12939 states. [2020-12-22 02:32:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12939 states to 12939 states and 14551 transitions. [2020-12-22 02:32:56,402 INFO L78 Accepts]: Start accepts. Automaton has 12939 states and 14551 transitions. Word has length 294 [2020-12-22 02:32:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:56,402 INFO L481 AbstractCegarLoop]: Abstraction has 12939 states and 14551 transitions. [2020-12-22 02:32:56,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 12939 states and 14551 transitions. [2020-12-22 02:32:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-12-22 02:32:56,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:56,411 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:32:56,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:32:56,412 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash 707636462, now seen corresponding path program 1 times [2020-12-22 02:32:56,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:56,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98516600] [2020-12-22 02:32:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 02:32:56,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98516600] [2020-12-22 02:32:56,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:56,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:32:56,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283921095] [2020-12-22 02:32:56,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:56,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:56,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:56,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:56,864 INFO L87 Difference]: Start difference. First operand 12939 states and 14551 transitions. Second operand 3 states. [2020-12-22 02:33:01,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:01,650 INFO L93 Difference]: Finished difference Result 30561 states and 34713 transitions. [2020-12-22 02:33:01,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:33:01,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-12-22 02:33:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:01,683 INFO L225 Difference]: With dead ends: 30561 [2020-12-22 02:33:01,684 INFO L226 Difference]: Without dead ends: 16740 [2020-12-22 02:33:01,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16740 states. [2020-12-22 02:33:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16740 to 15882. [2020-12-22 02:33:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-12-22 02:33:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 17831 transitions. [2020-12-22 02:33:01,987 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 17831 transitions. Word has length 334 [2020-12-22 02:33:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:02,085 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 17831 transitions. [2020-12-22 02:33:02,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:33:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 17831 transitions. [2020-12-22 02:33:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-12-22 02:33:02,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:02,099 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:33:02,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:33:02,100 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:02,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:02,101 INFO L82 PathProgramCache]: Analyzing trace with hash 902850880, now seen corresponding path program 1 times [2020-12-22 02:33:02,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:02,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136273985] [2020-12-22 02:33:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:33:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136273985] [2020-12-22 02:33:02,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:02,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:33:02,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752922589] [2020-12-22 02:33:02,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:33:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:02,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:33:02,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:33:02,594 INFO L87 Difference]: Start difference. First operand 15882 states and 17831 transitions. Second operand 4 states. [2020-12-22 02:33:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:08,685 INFO L93 Difference]: Finished difference Result 37324 states and 41988 transitions. [2020-12-22 02:33:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:33:08,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 401 [2020-12-22 02:33:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:08,726 INFO L225 Difference]: With dead ends: 37324 [2020-12-22 02:33:08,726 INFO L226 Difference]: Without dead ends: 21019 [2020-12-22 02:33:08,749 INFO L677 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 [2020-12-22 02:33:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21019 states. [2020-12-22 02:33:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21019 to 21014. [2020-12-22 02:33:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21014 states. [2020-12-22 02:33:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21014 states to 21014 states and 23719 transitions. [2020-12-22 02:33:09,053 INFO L78 Accepts]: Start accepts. Automaton has 21014 states and 23719 transitions. Word has length 401 [2020-12-22 02:33:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:09,054 INFO L481 AbstractCegarLoop]: Abstraction has 21014 states and 23719 transitions. [2020-12-22 02:33:09,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:33:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 21014 states and 23719 transitions. [2020-12-22 02:33:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-12-22 02:33:09,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:09,084 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-12-22 02:33:09,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:33:09,085 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:09,086 INFO L82 PathProgramCache]: Analyzing trace with hash 992577291, now seen corresponding path program 1 times [2020-12-22 02:33:09,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:09,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393460729] [2020-12-22 02:33:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-22 02:33:09,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393460729] [2020-12-22 02:33:09,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:09,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:33:09,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110909220] [2020-12-22 02:33:09,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:33:09,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:09,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:33:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:09,505 INFO L87 Difference]: Start difference. First operand 21014 states and 23719 transitions. Second operand 3 states. [2020-12-22 02:33:14,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:14,381 INFO L93 Difference]: Finished difference Result 53103 states and 60053 transitions. [2020-12-22 02:33:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:33:14,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-12-22 02:33:14,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:14,439 INFO L225 Difference]: With dead ends: 53103 [2020-12-22 02:33:14,440 INFO L226 Difference]: Without dead ends: 32091 [2020-12-22 02:33:14,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32091 states. [2020-12-22 02:33:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32091 to 32073. [2020-12-22 02:33:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32073 states. [2020-12-22 02:33:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32073 states to 32073 states and 35916 transitions. [2020-12-22 02:33:14,976 INFO L78 Accepts]: Start accepts. Automaton has 32073 states and 35916 transitions. Word has length 504 [2020-12-22 02:33:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:14,977 INFO L481 AbstractCegarLoop]: Abstraction has 32073 states and 35916 transitions. [2020-12-22 02:33:14,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:33:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 32073 states and 35916 transitions. [2020-12-22 02:33:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-12-22 02:33:15,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:15,009 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 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, 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] [2020-12-22 02:33:15,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:33:15,009 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:15,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:15,010 INFO L82 PathProgramCache]: Analyzing trace with hash 872769737, now seen corresponding path program 1 times [2020-12-22 02:33:15,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:15,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181240865] [2020-12-22 02:33:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-12-22 02:33:15,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181240865] [2020-12-22 02:33:15,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:15,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:33:15,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111409157] [2020-12-22 02:33:15,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:33:15,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:15,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:33:15,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:15,672 INFO L87 Difference]: Start difference. First operand 32073 states and 35916 transitions. Second operand 3 states. [2020-12-22 02:33:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:20,597 INFO L93 Difference]: Finished difference Result 69675 states and 78371 transitions. [2020-12-22 02:33:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:33:20,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 558 [2020-12-22 02:33:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:20,657 INFO L225 Difference]: With dead ends: 69675 [2020-12-22 02:33:20,658 INFO L226 Difference]: Without dead ends: 38029 [2020-12-22 02:33:20,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38029 states. [2020-12-22 02:33:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38029 to 38025. [2020-12-22 02:33:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38025 states. [2020-12-22 02:33:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38025 states to 38025 states and 42480 transitions. [2020-12-22 02:33:21,402 INFO L78 Accepts]: Start accepts. Automaton has 38025 states and 42480 transitions. Word has length 558 [2020-12-22 02:33:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:21,403 INFO L481 AbstractCegarLoop]: Abstraction has 38025 states and 42480 transitions. [2020-12-22 02:33:21,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:33:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 38025 states and 42480 transitions. [2020-12-22 02:33:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2020-12-22 02:33:21,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:21,438 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-12-22 02:33:21,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:33:21,438 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash 110829797, now seen corresponding path program 1 times [2020-12-22 02:33:21,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:21,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282284996] [2020-12-22 02:33:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-12-22 02:33:22,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282284996] [2020-12-22 02:33:22,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:22,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:33:22,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955879040] [2020-12-22 02:33:22,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 02:33:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:22,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 02:33:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:33:22,917 INFO L87 Difference]: Start difference. First operand 38025 states and 42480 transitions. Second operand 5 states. [2020-12-22 02:33:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:29,025 INFO L93 Difference]: Finished difference Result 77375 states and 86338 transitions. [2020-12-22 02:33:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 02:33:29,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 647 [2020-12-22 02:33:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:29,075 INFO L225 Difference]: With dead ends: 77375 [2020-12-22 02:33:29,075 INFO L226 Difference]: Without dead ends: 39710 [2020-12-22 02:33:29,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:33:29,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39710 states. [2020-12-22 02:33:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39710 to 39278. [2020-12-22 02:33:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39278 states. [2020-12-22 02:33:29,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39278 states to 39278 states and 43438 transitions. [2020-12-22 02:33:29,679 INFO L78 Accepts]: Start accepts. Automaton has 39278 states and 43438 transitions. Word has length 647 [2020-12-22 02:33:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:29,680 INFO L481 AbstractCegarLoop]: Abstraction has 39278 states and 43438 transitions. [2020-12-22 02:33:29,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 02:33:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 39278 states and 43438 transitions. [2020-12-22 02:33:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2020-12-22 02:33:29,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:29,708 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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] [2020-12-22 02:33:29,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 02:33:29,708 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1913167228, now seen corresponding path program 1 times [2020-12-22 02:33:29,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:29,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696795922] [2020-12-22 02:33:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2020-12-22 02:33:30,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696795922] [2020-12-22 02:33:30,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:30,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:33:30,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648421371] [2020-12-22 02:33:30,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:33:30,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:30,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:33:30,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:30,998 INFO L87 Difference]: Start difference. First operand 39278 states and 43438 transitions. Second operand 3 states. [2020-12-22 02:33:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:35,541 INFO L93 Difference]: Finished difference Result 86198 states and 95320 transitions. [2020-12-22 02:33:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:33:35,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 659 [2020-12-22 02:33:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:35,592 INFO L225 Difference]: With dead ends: 86198 [2020-12-22 02:33:35,593 INFO L226 Difference]: Without dead ends: 47347 [2020-12-22 02:33:35,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47347 states. [2020-12-22 02:33:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47347 to 41377. [2020-12-22 02:33:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41377 states. [2020-12-22 02:33:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41377 states to 41377 states and 45569 transitions. [2020-12-22 02:33:36,440 INFO L78 Accepts]: Start accepts. Automaton has 41377 states and 45569 transitions. Word has length 659 [2020-12-22 02:33:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:36,442 INFO L481 AbstractCegarLoop]: Abstraction has 41377 states and 45569 transitions. [2020-12-22 02:33:36,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:33:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 41377 states and 45569 transitions. [2020-12-22 02:33:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2020-12-22 02:33:36,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:36,492 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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] [2020-12-22 02:33:36,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 02:33:36,493 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:36,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1473293802, now seen corresponding path program 1 times [2020-12-22 02:33:36,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:36,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025036309] [2020-12-22 02:33:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2020-12-22 02:33:38,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025036309] [2020-12-22 02:33:38,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:38,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:33:38,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596885660] [2020-12-22 02:33:38,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:33:38,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:38,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:33:38,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:38,095 INFO L87 Difference]: Start difference. First operand 41377 states and 45569 transitions. Second operand 3 states. [2020-12-22 02:33:43,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:43,715 INFO L93 Difference]: Finished difference Result 89567 states and 99047 transitions. [2020-12-22 02:33:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:33:43,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 869 [2020-12-22 02:33:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:43,803 INFO L225 Difference]: With dead ends: 89567 [2020-12-22 02:33:43,803 INFO L226 Difference]: Without dead ends: 47767 [2020-12-22 02:33:43,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47767 states. [2020-12-22 02:33:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47767 to 47760. [2020-12-22 02:33:44,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47760 states. [2020-12-22 02:33:44,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47760 states to 47760 states and 52519 transitions. [2020-12-22 02:33:44,650 INFO L78 Accepts]: Start accepts. Automaton has 47760 states and 52519 transitions. Word has length 869 [2020-12-22 02:33:44,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:44,650 INFO L481 AbstractCegarLoop]: Abstraction has 47760 states and 52519 transitions. [2020-12-22 02:33:44,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:33:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 47760 states and 52519 transitions. [2020-12-22 02:33:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2020-12-22 02:33:44,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:44,971 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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] [2020-12-22 02:33:44,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:33:44,972 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:44,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1168926298, now seen corresponding path program 1 times [2020-12-22 02:33:44,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:44,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443615372] [2020-12-22 02:33:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 567 proven. 243 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 02:33:46,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443615372] [2020-12-22 02:33:46,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937154646] [2020-12-22 02:33:46,643 INFO L95 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 [2020-12-22 02:33:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:33:47,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:33:48,741 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:33:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 567 proven. 243 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 02:33:49,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:33:49,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-22 02:33:49,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382003870] [2020-12-22 02:33:50,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:33:50,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:50,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:33:50,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:33:50,003 INFO L87 Difference]: Start difference. First operand 47760 states and 52519 transitions. Second operand 4 states. [2020-12-22 02:33:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:57,515 INFO L93 Difference]: Finished difference Result 98065 states and 108058 transitions. [2020-12-22 02:33:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:33:57,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 872 [2020-12-22 02:33:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:57,626 INFO L225 Difference]: With dead ends: 98065 [2020-12-22 02:33:57,626 INFO L226 Difference]: Without dead ends: 50307 [2020-12-22 02:33:57,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 872 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:33:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50307 states. [2020-12-22 02:33:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50307 to 46042. [2020-12-22 02:33:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46042 states. [2020-12-22 02:33:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46042 states to 46042 states and 50290 transitions. [2020-12-22 02:33:58,590 INFO L78 Accepts]: Start accepts. Automaton has 46042 states and 50290 transitions. Word has length 872 [2020-12-22 02:33:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:58,592 INFO L481 AbstractCegarLoop]: Abstraction has 46042 states and 50290 transitions. [2020-12-22 02:33:58,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:33:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 46042 states and 50290 transitions. [2020-12-22 02:33:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 903 [2020-12-22 02:33:58,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:58,654 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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] [2020-12-22 02:33:58,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 02:33:58,870 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:58,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:58,872 INFO L82 PathProgramCache]: Analyzing trace with hash -928631244, now seen corresponding path program 1 times [2020-12-22 02:33:58,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:58,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209452124] [2020-12-22 02:33:58,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 904 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-22 02:34:00,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209452124] [2020-12-22 02:34:00,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:34:00,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:34:00,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520959434] [2020-12-22 02:34:00,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:34:00,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:00,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:34:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:00,733 INFO L87 Difference]: Start difference. First operand 46042 states and 50290 transitions. Second operand 3 states. [2020-12-22 02:34:06,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:34:06,585 INFO L93 Difference]: Finished difference Result 97618 states and 106292 transitions. [2020-12-22 02:34:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:34:06,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 902 [2020-12-22 02:34:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:34:06,722 INFO L225 Difference]: With dead ends: 97618 [2020-12-22 02:34:06,722 INFO L226 Difference]: Without dead ends: 51578 [2020-12-22 02:34:06,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51578 states. [2020-12-22 02:34:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51578 to 43889. [2020-12-22 02:34:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43889 states. [2020-12-22 02:34:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43889 states to 43889 states and 47651 transitions. [2020-12-22 02:34:07,515 INFO L78 Accepts]: Start accepts. Automaton has 43889 states and 47651 transitions. Word has length 902 [2020-12-22 02:34:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:34:07,516 INFO L481 AbstractCegarLoop]: Abstraction has 43889 states and 47651 transitions. [2020-12-22 02:34:07,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:34:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 43889 states and 47651 transitions. [2020-12-22 02:34:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 979 [2020-12-22 02:34:07,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:34:07,570 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2020-12-22 02:34:07,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 02:34:07,571 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:34:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:34:07,572 INFO L82 PathProgramCache]: Analyzing trace with hash -772835559, now seen corresponding path program 1 times [2020-12-22 02:34:07,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:34:07,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831509463] [2020-12-22 02:34:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:34:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 1208 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2020-12-22 02:34:08,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831509463] [2020-12-22 02:34:08,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:34:08,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:34:08,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859568322] [2020-12-22 02:34:08,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:34:08,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:08,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:34:08,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:34:08,965 INFO L87 Difference]: Start difference. First operand 43889 states and 47651 transitions. Second operand 4 states. [2020-12-22 02:34:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:34:21,169 INFO L93 Difference]: Finished difference Result 98003 states and 106632 transitions. [2020-12-22 02:34:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 02:34:21,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 978 [2020-12-22 02:34:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:34:21,390 INFO L225 Difference]: With dead ends: 98003 [2020-12-22 02:34:21,390 INFO L226 Difference]: Without dead ends: 54115 [2020-12-22 02:34:21,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:34:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54115 states. [2020-12-22 02:34:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54115 to 50690. [2020-12-22 02:34:21,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50690 states. [2020-12-22 02:34:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50690 states to 50690 states and 54863 transitions. [2020-12-22 02:34:22,059 INFO L78 Accepts]: Start accepts. Automaton has 50690 states and 54863 transitions. Word has length 978 [2020-12-22 02:34:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:34:22,060 INFO L481 AbstractCegarLoop]: Abstraction has 50690 states and 54863 transitions. [2020-12-22 02:34:22,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:34:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 50690 states and 54863 transitions. [2020-12-22 02:34:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1073 [2020-12-22 02:34:22,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:34:22,110 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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] [2020-12-22 02:34:22,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:34:22,111 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:34:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:34:22,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1049716, now seen corresponding path program 1 times [2020-12-22 02:34:22,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:34:22,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252584706] [2020-12-22 02:34:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:34:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2099 backedges. 1440 proven. 0 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-12-22 02:34:23,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252584706] [2020-12-22 02:34:23,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:34:23,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:34:23,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785771987] [2020-12-22 02:34:23,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:34:23,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:23,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:34:23,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:23,700 INFO L87 Difference]: Start difference. First operand 50690 states and 54863 transitions. Second operand 3 states. [2020-12-22 02:34:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:34:30,843 INFO L93 Difference]: Finished difference Result 109039 states and 118350 transitions. [2020-12-22 02:34:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:34:30,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1072 [2020-12-22 02:34:30,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:34:30,946 INFO L225 Difference]: With dead ends: 109039 [2020-12-22 02:34:30,946 INFO L226 Difference]: Without dead ends: 57924 [2020-12-22 02:34:30,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57924 states. [2020-12-22 02:34:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57924 to 57917. [2020-12-22 02:34:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57917 states. [2020-12-22 02:34:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57917 states to 57917 states and 62668 transitions. [2020-12-22 02:34:32,036 INFO L78 Accepts]: Start accepts. Automaton has 57917 states and 62668 transitions. Word has length 1072 [2020-12-22 02:34:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:34:32,037 INFO L481 AbstractCegarLoop]: Abstraction has 57917 states and 62668 transitions. [2020-12-22 02:34:32,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:34:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 57917 states and 62668 transitions. [2020-12-22 02:34:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1139 [2020-12-22 02:34:32,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:34:32,100 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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] [2020-12-22 02:34:32,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 02:34:32,101 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:34:32,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:34:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash 548140167, now seen corresponding path program 1 times [2020-12-22 02:34:32,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:34:32,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843712435] [2020-12-22 02:34:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:34:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1122 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-12-22 02:34:33,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843712435] [2020-12-22 02:34:33,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:34:33,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:34:33,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191716886] [2020-12-22 02:34:33,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:34:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:34:33,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:33,594 INFO L87 Difference]: Start difference. First operand 57917 states and 62668 transitions. Second operand 3 states. [2020-12-22 02:34:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:34:40,228 INFO L93 Difference]: Finished difference Result 114978 states and 124374 transitions. [2020-12-22 02:34:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:34:40,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1138 [2020-12-22 02:34:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:34:40,312 INFO L225 Difference]: With dead ends: 114978 [2020-12-22 02:34:40,312 INFO L226 Difference]: Without dead ends: 57062 [2020-12-22 02:34:40,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57062 states. [2020-12-22 02:34:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57062 to 55361. [2020-12-22 02:34:40,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55361 states. [2020-12-22 02:34:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55361 states to 55361 states and 59329 transitions. [2020-12-22 02:34:41,050 INFO L78 Accepts]: Start accepts. Automaton has 55361 states and 59329 transitions. Word has length 1138 [2020-12-22 02:34:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:34:41,051 INFO L481 AbstractCegarLoop]: Abstraction has 55361 states and 59329 transitions. [2020-12-22 02:34:41,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:34:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 55361 states and 59329 transitions. [2020-12-22 02:34:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1147 [2020-12-22 02:34:41,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:34:41,101 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2020-12-22 02:34:41,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 02:34:41,101 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:34:41,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:34:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1066163963, now seen corresponding path program 1 times [2020-12-22 02:34:41,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:34:41,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565682499] [2020-12-22 02:34:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:34:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2323 backedges. 1536 proven. 0 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2020-12-22 02:34:42,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565682499] [2020-12-22 02:34:42,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:34:42,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:34:42,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642675024] [2020-12-22 02:34:42,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:34:42,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:34:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:42,817 INFO L87 Difference]: Start difference. First operand 55361 states and 59329 transitions. Second operand 3 states. [2020-12-22 02:34:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:34:48,073 INFO L93 Difference]: Finished difference Result 111566 states and 119726 transitions. [2020-12-22 02:34:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:34:48,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1146 [2020-12-22 02:34:48,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:34:48,134 INFO L225 Difference]: With dead ends: 111566 [2020-12-22 02:34:48,134 INFO L226 Difference]: Without dead ends: 55782 [2020-12-22 02:34:48,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55782 states. [2020-12-22 02:34:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55782 to 48978. [2020-12-22 02:34:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48978 states. [2020-12-22 02:34:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48978 states to 48978 states and 52361 transitions. [2020-12-22 02:34:48,986 INFO L78 Accepts]: Start accepts. Automaton has 48978 states and 52361 transitions. Word has length 1146 [2020-12-22 02:34:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:34:48,987 INFO L481 AbstractCegarLoop]: Abstraction has 48978 states and 52361 transitions. [2020-12-22 02:34:48,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:34:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 48978 states and 52361 transitions. [2020-12-22 02:34:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1188 [2020-12-22 02:34:49,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:34:49,027 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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, 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, 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, 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] [2020-12-22 02:34:49,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 02:34:49,027 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:34:49,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:34:49,028 INFO L82 PathProgramCache]: Analyzing trace with hash -999634079, now seen corresponding path program 1 times [2020-12-22 02:34:49,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:34:49,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079397405] [2020-12-22 02:34:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:34:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 1553 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2020-12-22 02:34:50,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079397405] [2020-12-22 02:34:50,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:34:50,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:34:50,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25415286] [2020-12-22 02:34:50,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:34:50,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:34:50,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:50,661 INFO L87 Difference]: Start difference. First operand 48978 states and 52361 transitions. Second operand 3 states. [2020-12-22 02:34:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:34:56,602 INFO L93 Difference]: Finished difference Result 105629 states and 113038 transitions. [2020-12-22 02:34:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:34:56,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1187 [2020-12-22 02:34:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:34:56,665 INFO L225 Difference]: With dead ends: 105629 [2020-12-22 02:34:56,665 INFO L226 Difference]: Without dead ends: 56653 [2020-12-22 02:34:56,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:56,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56653 states. [2020-12-22 02:34:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56653 to 55357. [2020-12-22 02:34:57,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55357 states. [2020-12-22 02:34:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55357 states to 55357 states and 59154 transitions. [2020-12-22 02:34:57,279 INFO L78 Accepts]: Start accepts. Automaton has 55357 states and 59154 transitions. Word has length 1187 [2020-12-22 02:34:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:34:57,280 INFO L481 AbstractCegarLoop]: Abstraction has 55357 states and 59154 transitions. [2020-12-22 02:34:57,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:34:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 55357 states and 59154 transitions. [2020-12-22 02:34:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1190 [2020-12-22 02:34:57,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:34:57,347 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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, 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, 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, 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] [2020-12-22 02:34:57,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 02:34:57,347 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:34:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:34:57,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1627351399, now seen corresponding path program 1 times [2020-12-22 02:34:57,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:34:57,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521291736] [2020-12-22 02:34:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:34:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2135 backedges. 1181 proven. 0 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2020-12-22 02:34:59,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521291736] [2020-12-22 02:34:59,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:34:59,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:34:59,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032597279] [2020-12-22 02:34:59,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:34:59,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:59,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:34:59,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:34:59,361 INFO L87 Difference]: Start difference. First operand 55357 states and 59154 transitions. Second operand 3 states. [2020-12-22 02:35:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:05,291 INFO L93 Difference]: Finished difference Result 114130 states and 121931 transitions. [2020-12-22 02:35:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:35:05,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1189 [2020-12-22 02:35:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:05,370 INFO L225 Difference]: With dead ends: 114130 [2020-12-22 02:35:05,370 INFO L226 Difference]: Without dead ends: 58775 [2020-12-22 02:35:05,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58775 states. [2020-12-22 02:35:05,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58775 to 58764. [2020-12-22 02:35:05,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58764 states. [2020-12-22 02:35:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58764 states to 58764 states and 62628 transitions. [2020-12-22 02:35:06,010 INFO L78 Accepts]: Start accepts. Automaton has 58764 states and 62628 transitions. Word has length 1189 [2020-12-22 02:35:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:06,010 INFO L481 AbstractCegarLoop]: Abstraction has 58764 states and 62628 transitions. [2020-12-22 02:35:06,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:35:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 58764 states and 62628 transitions. [2020-12-22 02:35:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1191 [2020-12-22 02:35:06,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:06,067 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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] [2020-12-22 02:35:06,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 02:35:06,067 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 844793057, now seen corresponding path program 1 times [2020-12-22 02:35:06,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:06,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713110847] [2020-12-22 02:35:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 1214 proven. 0 refuted. 0 times theorem prover too weak. 963 trivial. 0 not checked. [2020-12-22 02:35:07,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713110847] [2020-12-22 02:35:07,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:07,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:35:07,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059493436] [2020-12-22 02:35:07,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:35:07,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:07,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:35:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:07,651 INFO L87 Difference]: Start difference. First operand 58764 states and 62628 transitions. Second operand 3 states. [2020-12-22 02:35:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:13,370 INFO L93 Difference]: Finished difference Result 114543 states and 122161 transitions. [2020-12-22 02:35:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:35:13,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1190 [2020-12-22 02:35:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:13,440 INFO L225 Difference]: With dead ends: 114543 [2020-12-22 02:35:13,440 INFO L226 Difference]: Without dead ends: 63876 [2020-12-22 02:35:13,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:35:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63876 states. [2020-12-22 02:35:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63876 to 63872. [2020-12-22 02:35:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63872 states. [2020-12-22 02:35:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63872 states to 63872 states and 67928 transitions. [2020-12-22 02:35:14,510 INFO L78 Accepts]: Start accepts. Automaton has 63872 states and 67928 transitions. Word has length 1190 [2020-12-22 02:35:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:14,513 INFO L481 AbstractCegarLoop]: Abstraction has 63872 states and 67928 transitions. [2020-12-22 02:35:14,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:35:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 63872 states and 67928 transitions. [2020-12-22 02:35:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1206 [2020-12-22 02:35:14,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:14,602 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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] [2020-12-22 02:35:14,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 02:35:14,602 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:14,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:14,603 INFO L82 PathProgramCache]: Analyzing trace with hash 647887385, now seen corresponding path program 1 times [2020-12-22 02:35:14,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:14,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267145483] [2020-12-22 02:35:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1456 backedges. 977 proven. 0 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2020-12-22 02:35:16,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267145483] [2020-12-22 02:35:16,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:16,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:35:16,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978006168] [2020-12-22 02:35:16,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:35:16,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:16,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:35:16,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:35:16,137 INFO L87 Difference]: Start difference. First operand 63872 states and 67928 transitions. Second operand 4 states. [2020-12-22 02:35:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:26,291 INFO L93 Difference]: Finished difference Result 135829 states and 144166 transitions. [2020-12-22 02:35:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:35:26,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1205 [2020-12-22 02:35:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:26,511 INFO L225 Difference]: With dead ends: 135829 [2020-12-22 02:35:26,511 INFO L226 Difference]: Without dead ends: 79629 [2020-12-22 02:35:26,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:35:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79629 states. [2020-12-22 02:35:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79629 to 73657. [2020-12-22 02:35:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73657 states. [2020-12-22 02:35:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73657 states to 73657 states and 78199 transitions. [2020-12-22 02:35:28,321 INFO L78 Accepts]: Start accepts. Automaton has 73657 states and 78199 transitions. Word has length 1205 [2020-12-22 02:35:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:28,327 INFO L481 AbstractCegarLoop]: Abstraction has 73657 states and 78199 transitions. [2020-12-22 02:35:28,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:35:28,328 INFO L276 IsEmpty]: Start isEmpty. Operand 73657 states and 78199 transitions. [2020-12-22 02:35:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-12-22 02:35:28,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:28,401 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 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, 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, 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] [2020-12-22 02:35:28,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 02:35:28,401 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:28,402 INFO L82 PathProgramCache]: Analyzing trace with hash 486748550, now seen corresponding path program 1 times [2020-12-22 02:35:28,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:28,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269360474] [2020-12-22 02:35:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1167 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2020-12-22 02:35:30,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269360474] [2020-12-22 02:35:30,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:35:30,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:35:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814869133] [2020-12-22 02:35:30,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:35:30,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:35:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:35:30,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:35:30,416 INFO L87 Difference]: Start difference. First operand 73657 states and 78199 transitions. Second operand 4 states. [2020-12-22 02:35:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:35:41,546 INFO L93 Difference]: Finished difference Result 160508 states and 170084 transitions. [2020-12-22 02:35:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:35:41,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1212 [2020-12-22 02:35:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:35:41,651 INFO L225 Difference]: With dead ends: 160508 [2020-12-22 02:35:41,651 INFO L226 Difference]: Without dead ends: 95802 [2020-12-22 02:35:41,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:35:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95802 states. [2020-12-22 02:35:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95802 to 68537. [2020-12-22 02:35:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68537 states. [2020-12-22 02:35:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68537 states to 68537 states and 72542 transitions. [2020-12-22 02:35:43,035 INFO L78 Accepts]: Start accepts. Automaton has 68537 states and 72542 transitions. Word has length 1212 [2020-12-22 02:35:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:35:43,036 INFO L481 AbstractCegarLoop]: Abstraction has 68537 states and 72542 transitions. [2020-12-22 02:35:43,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:35:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 68537 states and 72542 transitions. [2020-12-22 02:35:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1470 [2020-12-22 02:35:43,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:35:43,103 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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] [2020-12-22 02:35:43,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 02:35:43,104 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:35:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:35:43,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1861803014, now seen corresponding path program 1 times [2020-12-22 02:35:43,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:35:43,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783572650] [2020-12-22 02:35:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:35:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 1699 proven. 290 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2020-12-22 02:35:45,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783572650] [2020-12-22 02:35:45,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650110438] [2020-12-22 02:35:45,677 INFO L95 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 [2020-12-22 02:35:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:35:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:35:46,274 INFO L286 TraceCheckSpWp]: Computing forward predicates...