/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/Problem16_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:19:52,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:19:52,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:19:52,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:19:52,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:19:52,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:19:52,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:19:52,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:19:52,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:19:52,175 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:19:52,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:19:52,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:19:52,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:19:52,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:19:52,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:19:52,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:19:52,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:19:52,180 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:19:52,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:19:52,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:19:52,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:19:52,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:19:52,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:19:52,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:19:52,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:19:52,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:19:52,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:19:52,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:19:52,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:19:52,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:19:52,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:19:52,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:19:52,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:19:52,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:19:52,724 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:19:52,725 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:19:52,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label54.c [2020-12-22 02:19:52,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57d339c31/ebd0c6c1b0d34abf860141a04741eb40/FLAG38e090a70 [2020-12-22 02:19:53,674 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:19:53,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label54.c [2020-12-22 02:19:53,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57d339c31/ebd0c6c1b0d34abf860141a04741eb40/FLAG38e090a70 [2020-12-22 02:19:53,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57d339c31/ebd0c6c1b0d34abf860141a04741eb40 [2020-12-22 02:19:53,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:19:53,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:19:53,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:19:53,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:19:53,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:19:53,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:19:53" (1/1) ... [2020-12-22 02:19:53,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d314b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:53, skipping insertion in model container [2020-12-22 02:19:53,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:19:53" (1/1) ... [2020-12-22 02:19:53,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:19:53,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:19:54,123 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/Problem16_label54.c[2804,2817] [2020-12-22 02:19:54,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:19:54,633 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:19:54,674 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/Problem16_label54.c[2804,2817] [2020-12-22 02:19:54,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:19:54,953 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:19:54,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54 WrapperNode [2020-12-22 02:19:54,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:19:54,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:19:54,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:19:54,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:19:54,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (1/1) ... [2020-12-22 02:19:55,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (1/1) ... [2020-12-22 02:19:55,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:19:55,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:19:55,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:19:55,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:19:55,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (1/1) ... [2020-12-22 02:19:55,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (1/1) ... [2020-12-22 02:19:55,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (1/1) ... [2020-12-22 02:19:55,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (1/1) ... [2020-12-22 02:19:55,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (1/1) ... [2020-12-22 02:19:55,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (1/1) ... [2020-12-22 02:19:55,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (1/1) ... [2020-12-22 02:19:55,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:19:55,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:19:55,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:19:55,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:19:55,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (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 02:19:55,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:19:55,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:19:55,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:19:55,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:19:58,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:19:58,568 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:19:58,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:19:58 BoogieIcfgContainer [2020-12-22 02:19:58,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:19:58,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:19:58,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:19:58,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:19:58,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:19:53" (1/3) ... [2020-12-22 02:19:58,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fdf42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:19:58, skipping insertion in model container [2020-12-22 02:19:58,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:19:54" (2/3) ... [2020-12-22 02:19:58,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fdf42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:19:58, skipping insertion in model container [2020-12-22 02:19:58,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:19:58" (3/3) ... [2020-12-22 02:19:58,587 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label54.c [2020-12-22 02:19:58,595 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:19:58,600 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:19:58,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:19:58,654 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:19:58,654 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:19:58,654 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:19:58,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:19:58,655 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:19:58,655 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:19:58,655 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:19:58,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:19:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2020-12-22 02:19:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 02:19:58,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:19:58,692 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] [2020-12-22 02:19:58,692 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:19:58,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:19:58,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1225036359, now seen corresponding path program 1 times [2020-12-22 02:19:58,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:19:58,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597139541] [2020-12-22 02:19:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:19:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:19:59,000 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 02:19:59,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597139541] [2020-12-22 02:19:59,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:19:59,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:19:59,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577688728] [2020-12-22 02:19:59,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:19:59,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:19:59,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:19:59,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:19:59,028 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 3 states. [2020-12-22 02:20:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:01,426 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2020-12-22 02:20:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:01,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-22 02:20:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:01,481 INFO L225 Difference]: With dead ends: 1122 [2020-12-22 02:20:01,481 INFO L226 Difference]: Without dead ends: 662 [2020-12-22 02:20:01,493 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 02:20:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2020-12-22 02:20:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2020-12-22 02:20:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2020-12-22 02:20:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1046 transitions. [2020-12-22 02:20:01,620 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1046 transitions. Word has length 25 [2020-12-22 02:20:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:01,620 INFO L481 AbstractCegarLoop]: Abstraction has 662 states and 1046 transitions. [2020-12-22 02:20:01,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:01,620 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1046 transitions. [2020-12-22 02:20:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 02:20:01,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:01,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:01,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:20:01,625 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash 51947491, now seen corresponding path program 1 times [2020-12-22 02:20:01,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:01,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056792181] [2020-12-22 02:20:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:20:01,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056792181] [2020-12-22 02:20:01,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:01,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:20:01,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457129463] [2020-12-22 02:20:01,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:01,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:01,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:01,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:01,834 INFO L87 Difference]: Start difference. First operand 662 states and 1046 transitions. Second operand 3 states. [2020-12-22 02:20:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:04,076 INFO L93 Difference]: Finished difference Result 1980 states and 3133 transitions. [2020-12-22 02:20:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:04,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 02:20:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:04,086 INFO L225 Difference]: With dead ends: 1980 [2020-12-22 02:20:04,086 INFO L226 Difference]: Without dead ends: 1320 [2020-12-22 02:20:04,093 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 02:20:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-12-22 02:20:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2020-12-22 02:20:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-12-22 02:20:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1812 transitions. [2020-12-22 02:20:04,149 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1812 transitions. Word has length 96 [2020-12-22 02:20:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:04,150 INFO L481 AbstractCegarLoop]: Abstraction has 1320 states and 1812 transitions. [2020-12-22 02:20:04,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1812 transitions. [2020-12-22 02:20:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 02:20:04,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:04,165 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:20:04,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:20:04,165 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:04,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1840002416, now seen corresponding path program 1 times [2020-12-22 02:20:04,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:04,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665551206] [2020-12-22 02:20:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:20:04,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665551206] [2020-12-22 02:20:04,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:04,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:04,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642257117] [2020-12-22 02:20:04,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:04,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:04,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:04,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:04,535 INFO L87 Difference]: Start difference. First operand 1320 states and 1812 transitions. Second operand 3 states. [2020-12-22 02:20:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:06,708 INFO L93 Difference]: Finished difference Result 3296 states and 4623 transitions. [2020-12-22 02:20:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:06,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 180 [2020-12-22 02:20:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:06,721 INFO L225 Difference]: With dead ends: 3296 [2020-12-22 02:20:06,722 INFO L226 Difference]: Without dead ends: 1978 [2020-12-22 02:20:06,725 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 02:20:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2020-12-22 02:20:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2020-12-22 02:20:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2020-12-22 02:20:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2554 transitions. [2020-12-22 02:20:06,779 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2554 transitions. Word has length 180 [2020-12-22 02:20:06,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:06,788 INFO L481 AbstractCegarLoop]: Abstraction has 1978 states and 2554 transitions. [2020-12-22 02:20:06,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2554 transitions. [2020-12-22 02:20:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-12-22 02:20:06,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:06,804 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-12-22 02:20:06,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:20:06,804 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1471741938, now seen corresponding path program 1 times [2020-12-22 02:20:06,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:06,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461430174] [2020-12-22 02:20:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-12-22 02:20:07,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461430174] [2020-12-22 02:20:07,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:07,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:20:07,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244307553] [2020-12-22 02:20:07,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:07,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:07,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:07,294 INFO L87 Difference]: Start difference. First operand 1978 states and 2554 transitions. Second operand 3 states. [2020-12-22 02:20:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:09,549 INFO L93 Difference]: Finished difference Result 5270 states and 6849 transitions. [2020-12-22 02:20:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:09,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 365 [2020-12-22 02:20:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:09,567 INFO L225 Difference]: With dead ends: 5270 [2020-12-22 02:20:09,567 INFO L226 Difference]: Without dead ends: 2636 [2020-12-22 02:20:09,572 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 02:20:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2020-12-22 02:20:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2307. [2020-12-22 02:20:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2307 states. [2020-12-22 02:20:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 2540 transitions. [2020-12-22 02:20:09,635 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 2540 transitions. Word has length 365 [2020-12-22 02:20:09,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:09,636 INFO L481 AbstractCegarLoop]: Abstraction has 2307 states and 2540 transitions. [2020-12-22 02:20:09,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 2540 transitions. [2020-12-22 02:20:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-12-22 02:20:09,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:09,650 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 02:20:09,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:20:09,650 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash 930512037, now seen corresponding path program 1 times [2020-12-22 02:20:09,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:09,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55487894] [2020-12-22 02:20:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2020-12-22 02:20:10,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55487894] [2020-12-22 02:20:10,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:10,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:20:10,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025152824] [2020-12-22 02:20:10,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:10,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:10,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:10,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:10,124 INFO L87 Difference]: Start difference. First operand 2307 states and 2540 transitions. Second operand 3 states. [2020-12-22 02:20:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:11,948 INFO L93 Difference]: Finished difference Result 6915 states and 7615 transitions. [2020-12-22 02:20:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:11,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 406 [2020-12-22 02:20:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:11,972 INFO L225 Difference]: With dead ends: 6915 [2020-12-22 02:20:11,973 INFO L226 Difference]: Without dead ends: 4610 [2020-12-22 02:20:11,978 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 02:20:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2020-12-22 02:20:12,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4281. [2020-12-22 02:20:12,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4281 states. [2020-12-22 02:20:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 4668 transitions. [2020-12-22 02:20:12,080 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 4668 transitions. Word has length 406 [2020-12-22 02:20:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:12,081 INFO L481 AbstractCegarLoop]: Abstraction has 4281 states and 4668 transitions. [2020-12-22 02:20:12,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 4668 transitions. [2020-12-22 02:20:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-12-22 02:20:12,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:12,096 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 02:20:12,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:20:12,096 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:12,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1251593749, now seen corresponding path program 1 times [2020-12-22 02:20:12,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:12,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121338367] [2020-12-22 02:20:12,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 367 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-22 02:20:12,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121338367] [2020-12-22 02:20:12,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:12,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:20:12,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284919157] [2020-12-22 02:20:12,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:12,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:12,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:12,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:12,561 INFO L87 Difference]: Start difference. First operand 4281 states and 4668 transitions. Second operand 3 states. [2020-12-22 02:20:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:13,986 INFO L93 Difference]: Finished difference Result 9876 states and 10726 transitions. [2020-12-22 02:20:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:13,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-12-22 02:20:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:14,015 INFO L225 Difference]: With dead ends: 9876 [2020-12-22 02:20:14,015 INFO L226 Difference]: Without dead ends: 5597 [2020-12-22 02:20:14,022 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 02:20:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2020-12-22 02:20:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5597. [2020-12-22 02:20:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5597 states. [2020-12-22 02:20:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 5954 transitions. [2020-12-22 02:20:14,142 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 5954 transitions. Word has length 507 [2020-12-22 02:20:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:14,143 INFO L481 AbstractCegarLoop]: Abstraction has 5597 states and 5954 transitions. [2020-12-22 02:20:14,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 5954 transitions. [2020-12-22 02:20:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2020-12-22 02:20:14,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:14,166 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-12-22 02:20:14,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:20:14,166 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:14,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:14,167 INFO L82 PathProgramCache]: Analyzing trace with hash 231497912, now seen corresponding path program 1 times [2020-12-22 02:20:14,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:14,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582268774] [2020-12-22 02:20:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-22 02:20:15,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582268774] [2020-12-22 02:20:15,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:15,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:20:15,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685428851] [2020-12-22 02:20:15,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:15,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:15,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:15,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:15,156 INFO L87 Difference]: Start difference. First operand 5597 states and 5954 transitions. Second operand 3 states. [2020-12-22 02:20:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:16,638 INFO L93 Difference]: Finished difference Result 11192 states and 11914 transitions. [2020-12-22 02:20:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:16,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 621 [2020-12-22 02:20:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:16,668 INFO L225 Difference]: With dead ends: 11192 [2020-12-22 02:20:16,668 INFO L226 Difference]: Without dead ends: 5926 [2020-12-22 02:20:16,675 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 02:20:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2020-12-22 02:20:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5926. [2020-12-22 02:20:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5926 states. [2020-12-22 02:20:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6291 transitions. [2020-12-22 02:20:16,802 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6291 transitions. Word has length 621 [2020-12-22 02:20:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:16,803 INFO L481 AbstractCegarLoop]: Abstraction has 5926 states and 6291 transitions. [2020-12-22 02:20:16,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6291 transitions. [2020-12-22 02:20:16,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2020-12-22 02:20:16,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:16,830 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:20:16,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:20:16,831 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2043187176, now seen corresponding path program 1 times [2020-12-22 02:20:16,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:16,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136429452] [2020-12-22 02:20:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 975 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 02:20:17,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136429452] [2020-12-22 02:20:17,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:17,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:17,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192705246] [2020-12-22 02:20:17,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:17,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:17,617 INFO L87 Difference]: Start difference. First operand 5926 states and 6291 transitions. Second operand 3 states. [2020-12-22 02:20:19,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:19,243 INFO L93 Difference]: Finished difference Result 14153 states and 15140 transitions. [2020-12-22 02:20:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:19,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 736 [2020-12-22 02:20:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:19,284 INFO L225 Difference]: With dead ends: 14153 [2020-12-22 02:20:19,284 INFO L226 Difference]: Without dead ends: 8887 [2020-12-22 02:20:19,293 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 02:20:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2020-12-22 02:20:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8558. [2020-12-22 02:20:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8558 states. [2020-12-22 02:20:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 8973 transitions. [2020-12-22 02:20:19,457 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 8973 transitions. Word has length 736 [2020-12-22 02:20:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:19,459 INFO L481 AbstractCegarLoop]: Abstraction has 8558 states and 8973 transitions. [2020-12-22 02:20:19,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 8973 transitions. [2020-12-22 02:20:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2020-12-22 02:20:19,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:19,497 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:20:19,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:20:19,498 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1513241308, now seen corresponding path program 1 times [2020-12-22 02:20:19,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:19,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272875137] [2020-12-22 02:20:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 942 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2020-12-22 02:20:20,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272875137] [2020-12-22 02:20:20,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:20,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:20,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105895195] [2020-12-22 02:20:20,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:20,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:20,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:20,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:20,250 INFO L87 Difference]: Start difference. First operand 8558 states and 8973 transitions. Second operand 3 states. [2020-12-22 02:20:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:21,822 INFO L93 Difference]: Finished difference Result 19417 states and 20488 transitions. [2020-12-22 02:20:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:21,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 851 [2020-12-22 02:20:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:21,848 INFO L225 Difference]: With dead ends: 19417 [2020-12-22 02:20:21,848 INFO L226 Difference]: Without dead ends: 11190 [2020-12-22 02:20:21,860 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 02:20:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2020-12-22 02:20:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 10203. [2020-12-22 02:20:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10203 states. [2020-12-22 02:20:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 10674 transitions. [2020-12-22 02:20:22,011 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 10674 transitions. Word has length 851 [2020-12-22 02:20:22,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:22,017 INFO L481 AbstractCegarLoop]: Abstraction has 10203 states and 10674 transitions. [2020-12-22 02:20:22,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 10674 transitions. [2020-12-22 02:20:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-12-22 02:20:22,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:22,045 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:22,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:20:22,046 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:22,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:22,047 INFO L82 PathProgramCache]: Analyzing trace with hash -478922273, now seen corresponding path program 1 times [2020-12-22 02:20:22,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:22,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451330659] [2020-12-22 02:20:22,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2762 backedges. 1939 proven. 0 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2020-12-22 02:20:23,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451330659] [2020-12-22 02:20:23,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:23,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825112400] [2020-12-22 02:20:23,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:23,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:23,558 INFO L87 Difference]: Start difference. First operand 10203 states and 10674 transitions. Second operand 3 states. [2020-12-22 02:20:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:25,169 INFO L93 Difference]: Finished difference Result 23036 states and 24244 transitions. [2020-12-22 02:20:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:25,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1212 [2020-12-22 02:20:25,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:25,199 INFO L225 Difference]: With dead ends: 23036 [2020-12-22 02:20:25,199 INFO L226 Difference]: Without dead ends: 13164 [2020-12-22 02:20:25,212 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 02:20:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2020-12-22 02:20:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 12835. [2020-12-22 02:20:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12835 states. [2020-12-22 02:20:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13357 transitions. [2020-12-22 02:20:25,397 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13357 transitions. Word has length 1212 [2020-12-22 02:20:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:25,398 INFO L481 AbstractCegarLoop]: Abstraction has 12835 states and 13357 transitions. [2020-12-22 02:20:25,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13357 transitions. [2020-12-22 02:20:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1214 [2020-12-22 02:20:25,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:25,430 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:20:25,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:20:25,430 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:25,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1311034286, now seen corresponding path program 1 times [2020-12-22 02:20:25,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:25,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707078721] [2020-12-22 02:20:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2768 backedges. 955 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2020-12-22 02:20:27,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707078721] [2020-12-22 02:20:27,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:20:27,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:20:27,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44969203] [2020-12-22 02:20:27,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:27,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:27,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:27,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:20:27,130 INFO L87 Difference]: Start difference. First operand 12835 states and 13357 transitions. Second operand 3 states. [2020-12-22 02:20:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:28,816 INFO L93 Difference]: Finished difference Result 27971 states and 29124 transitions. [2020-12-22 02:20:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:28,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1213 [2020-12-22 02:20:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:28,844 INFO L225 Difference]: With dead ends: 27971 [2020-12-22 02:20:28,844 INFO L226 Difference]: Without dead ends: 13493 [2020-12-22 02:20:28,859 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 02:20:28,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2020-12-22 02:20:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 12835. [2020-12-22 02:20:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12835 states. [2020-12-22 02:20:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13233 transitions. [2020-12-22 02:20:29,033 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13233 transitions. Word has length 1213 [2020-12-22 02:20:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:29,034 INFO L481 AbstractCegarLoop]: Abstraction has 12835 states and 13233 transitions. [2020-12-22 02:20:29,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:20:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13233 transitions. [2020-12-22 02:20:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1330 [2020-12-22 02:20:29,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:29,075 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 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 02:20:29,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:20:29,075 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash 994197539, now seen corresponding path program 1 times [2020-12-22 02:20:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:29,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810167085] [2020-12-22 02:20:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2989 backedges. 2217 proven. 6 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2020-12-22 02:20:32,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810167085] [2020-12-22 02:20:32,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472543605] [2020-12-22 02:20:32,489 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 02:20:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 02:20:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:20:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2989 backedges. 1582 proven. 201 refuted. 0 times theorem prover too weak. 1206 trivial. 0 not checked. [2020-12-22 02:20:37,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:20:37,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3] total 10 [2020-12-22 02:20:37,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202149556] [2020-12-22 02:20:37,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 02:20:37,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:37,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 02:20:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 02:20:37,353 INFO L87 Difference]: Start difference. First operand 12835 states and 13233 transitions. Second operand 10 states. [2020-12-22 02:20:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:50,339 INFO L93 Difference]: Finished difference Result 36606 states and 37755 transitions. [2020-12-22 02:20:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 02:20:50,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1329 [2020-12-22 02:20:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:50,380 INFO L225 Difference]: With dead ends: 36606 [2020-12-22 02:20:50,380 INFO L226 Difference]: Without dead ends: 24102 [2020-12-22 02:20:50,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1357 GetRequests, 1336 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-12-22 02:20:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24102 states. [2020-12-22 02:20:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24102 to 12835. [2020-12-22 02:20:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12835 states. [2020-12-22 02:20:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13207 transitions. [2020-12-22 02:20:50,704 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13207 transitions. Word has length 1329 [2020-12-22 02:20:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:20:50,705 INFO L481 AbstractCegarLoop]: Abstraction has 12835 states and 13207 transitions. [2020-12-22 02:20:50,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 02:20:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13207 transitions. [2020-12-22 02:20:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1594 [2020-12-22 02:20:50,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:20:50,745 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:20:50,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 02:20:50,960 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:20:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:20:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1209946731, now seen corresponding path program 1 times [2020-12-22 02:20:50,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:20:50,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117915008] [2020-12-22 02:20:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:20:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 2101 proven. 156 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2020-12-22 02:20:54,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117915008] [2020-12-22 02:20:54,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269084674] [2020-12-22 02:20:54,414 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 02:20:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:20:54,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:20:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:20:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 2257 proven. 0 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2020-12-22 02:20:58,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:20:58,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 02:20:58,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152604055] [2020-12-22 02:20:58,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:20:58,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:20:58,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:20:58,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:20:58,030 INFO L87 Difference]: Start difference. First operand 12835 states and 13207 transitions. Second operand 3 states. [2020-12-22 02:20:59,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:20:59,846 INFO L93 Difference]: Finished difference Result 27642 states and 28453 transitions. [2020-12-22 02:20:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:20:59,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1593 [2020-12-22 02:20:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:20:59,878 INFO L225 Difference]: With dead ends: 27642 [2020-12-22 02:20:59,878 INFO L226 Difference]: Without dead ends: 15138 [2020-12-22 02:20:59,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1597 GetRequests, 1592 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:20:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15138 states. [2020-12-22 02:21:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15138 to 14151. [2020-12-22 02:21:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14151 states. [2020-12-22 02:21:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14537 transitions. [2020-12-22 02:21:00,128 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14537 transitions. Word has length 1593 [2020-12-22 02:21:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:00,129 INFO L481 AbstractCegarLoop]: Abstraction has 14151 states and 14537 transitions. [2020-12-22 02:21:00,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14537 transitions. [2020-12-22 02:21:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1763 [2020-12-22 02:21:00,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:00,187 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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, 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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:21:00,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 02:21:00,403 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:00,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1201884880, now seen corresponding path program 1 times [2020-12-22 02:21:00,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:00,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280051251] [2020-12-22 02:21:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6167 backedges. 4102 proven. 0 refuted. 0 times theorem prover too weak. 2065 trivial. 0 not checked. [2020-12-22 02:21:03,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280051251] [2020-12-22 02:21:03,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:03,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 02:21:03,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256702078] [2020-12-22 02:21:03,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 02:21:03,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:03,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 02:21:03,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:21:03,722 INFO L87 Difference]: Start difference. First operand 14151 states and 14537 transitions. Second operand 5 states. [2020-12-22 02:21:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:07,115 INFO L93 Difference]: Finished difference Result 28638 states and 29429 transitions. [2020-12-22 02:21:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 02:21:07,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1762 [2020-12-22 02:21:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:07,147 INFO L225 Difference]: With dead ends: 28638 [2020-12-22 02:21:07,147 INFO L226 Difference]: Without dead ends: 14818 [2020-12-22 02:21:07,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:21:07,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14818 states. [2020-12-22 02:21:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14818 to 14480. [2020-12-22 02:21:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14480 states. [2020-12-22 02:21:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14877 transitions. [2020-12-22 02:21:07,369 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14877 transitions. Word has length 1762 [2020-12-22 02:21:07,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:07,371 INFO L481 AbstractCegarLoop]: Abstraction has 14480 states and 14877 transitions. [2020-12-22 02:21:07,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 02:21:07,371 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14877 transitions. [2020-12-22 02:21:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1911 [2020-12-22 02:21:07,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:07,424 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:21:07,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:21:07,425 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:07,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:07,426 INFO L82 PathProgramCache]: Analyzing trace with hash -229594498, now seen corresponding path program 1 times [2020-12-22 02:21:07,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:07,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472457318] [2020-12-22 02:21:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7055 backedges. 1279 proven. 0 refuted. 0 times theorem prover too weak. 5776 trivial. 0 not checked. [2020-12-22 02:21:10,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472457318] [2020-12-22 02:21:10,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:10,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:21:10,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873527266] [2020-12-22 02:21:10,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:10,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:10,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:10,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:10,404 INFO L87 Difference]: Start difference. First operand 14480 states and 14877 transitions. Second operand 3 states. [2020-12-22 02:21:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:12,179 INFO L93 Difference]: Finished difference Result 31261 states and 32126 transitions. [2020-12-22 02:21:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:12,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1910 [2020-12-22 02:21:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:12,203 INFO L225 Difference]: With dead ends: 31261 [2020-12-22 02:21:12,203 INFO L226 Difference]: Without dead ends: 17112 [2020-12-22 02:21:12,214 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 02:21:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17112 states. [2020-12-22 02:21:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17112 to 16454. [2020-12-22 02:21:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16454 states. [2020-12-22 02:21:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16454 states to 16454 states and 16877 transitions. [2020-12-22 02:21:12,440 INFO L78 Accepts]: Start accepts. Automaton has 16454 states and 16877 transitions. Word has length 1910 [2020-12-22 02:21:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:12,442 INFO L481 AbstractCegarLoop]: Abstraction has 16454 states and 16877 transitions. [2020-12-22 02:21:12,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 16454 states and 16877 transitions. [2020-12-22 02:21:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1977 [2020-12-22 02:21:12,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:12,487 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:21:12,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 02:21:12,488 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:12,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1713385213, now seen corresponding path program 1 times [2020-12-22 02:21:12,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:12,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761988734] [2020-12-22 02:21:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7377 backedges. 3754 proven. 1033 refuted. 0 times theorem prover too weak. 2590 trivial. 0 not checked. [2020-12-22 02:21:19,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761988734] [2020-12-22 02:21:19,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108450917] [2020-12-22 02:21:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:20,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2316 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:21:20,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7377 backedges. 4039 proven. 0 refuted. 0 times theorem prover too weak. 3338 trivial. 0 not checked. [2020-12-22 02:21:24,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:21:24,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-22 02:21:24,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438099277] [2020-12-22 02:21:24,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:24,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:24,096 INFO L87 Difference]: Start difference. First operand 16454 states and 16877 transitions. Second operand 3 states. [2020-12-22 02:21:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:25,807 INFO L93 Difference]: Finished difference Result 33235 states and 34090 transitions. [2020-12-22 02:21:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:25,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1976 [2020-12-22 02:21:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:25,827 INFO L225 Difference]: With dead ends: 33235 [2020-12-22 02:21:25,827 INFO L226 Difference]: Without dead ends: 17112 [2020-12-22 02:21:25,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1984 GetRequests, 1977 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17112 states. [2020-12-22 02:21:26,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17112 to 17112. [2020-12-22 02:21:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17112 states. [2020-12-22 02:21:26,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17112 states to 17112 states and 17539 transitions. [2020-12-22 02:21:26,152 INFO L78 Accepts]: Start accepts. Automaton has 17112 states and 17539 transitions. Word has length 1976 [2020-12-22 02:21:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:26,154 INFO L481 AbstractCegarLoop]: Abstraction has 17112 states and 17539 transitions. [2020-12-22 02:21:26,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 17112 states and 17539 transitions. [2020-12-22 02:21:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2131 [2020-12-22 02:21:26,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:26,203 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 8, 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, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:21:26,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 02:21:26,418 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash 230610865, now seen corresponding path program 1 times [2020-12-22 02:21:26,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:26,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85682715] [2020-12-22 02:21:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9359 backedges. 5597 proven. 0 refuted. 0 times theorem prover too weak. 3762 trivial. 0 not checked. [2020-12-22 02:21:29,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85682715] [2020-12-22 02:21:29,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:29,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:21:29,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866724829] [2020-12-22 02:21:29,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:29,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:29,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:29,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:29,378 INFO L87 Difference]: Start difference. First operand 17112 states and 17539 transitions. Second operand 3 states. [2020-12-22 02:21:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:31,096 INFO L93 Difference]: Finished difference Result 33893 states and 34745 transitions. [2020-12-22 02:21:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:31,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2130 [2020-12-22 02:21:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:31,114 INFO L225 Difference]: With dead ends: 33893 [2020-12-22 02:21:31,114 INFO L226 Difference]: Without dead ends: 17112 [2020-12-22 02:21:31,127 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 02:21:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17112 states. [2020-12-22 02:21:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17112 to 16783. [2020-12-22 02:21:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16783 states. [2020-12-22 02:21:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16783 states to 16783 states and 17083 transitions. [2020-12-22 02:21:31,354 INFO L78 Accepts]: Start accepts. Automaton has 16783 states and 17083 transitions. Word has length 2130 [2020-12-22 02:21:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:31,355 INFO L481 AbstractCegarLoop]: Abstraction has 16783 states and 17083 transitions. [2020-12-22 02:21:31,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:31,355 INFO L276 IsEmpty]: Start isEmpty. Operand 16783 states and 17083 transitions. [2020-12-22 02:21:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2190 [2020-12-22 02:21:31,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:31,400 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 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 02:21:31,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:21:31,400 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash 237958790, now seen corresponding path program 1 times [2020-12-22 02:21:31,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:31,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245800913] [2020-12-22 02:21:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8579 backedges. 4345 proven. 1033 refuted. 0 times theorem prover too weak. 3201 trivial. 0 not checked. [2020-12-22 02:21:39,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245800913] [2020-12-22 02:21:39,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377146388] [2020-12-22 02:21:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:40,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2529 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:21:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8579 backedges. 4791 proven. 0 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2020-12-22 02:21:44,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:21:44,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-12-22 02:21:44,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159831560] [2020-12-22 02:21:44,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:44,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:44,044 INFO L87 Difference]: Start difference. First operand 16783 states and 17083 transitions. Second operand 3 states. [2020-12-22 02:21:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:46,024 INFO L93 Difference]: Finished difference Result 35538 states and 36190 transitions. [2020-12-22 02:21:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:46,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2189 [2020-12-22 02:21:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:46,042 INFO L225 Difference]: With dead ends: 35538 [2020-12-22 02:21:46,042 INFO L226 Difference]: Without dead ends: 19086 [2020-12-22 02:21:46,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2197 GetRequests, 2190 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:21:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19086 states. [2020-12-22 02:21:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19086 to 18428. [2020-12-22 02:21:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18428 states. [2020-12-22 02:21:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 18750 transitions. [2020-12-22 02:21:46,283 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 18750 transitions. Word has length 2189 [2020-12-22 02:21:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:46,284 INFO L481 AbstractCegarLoop]: Abstraction has 18428 states and 18750 transitions. [2020-12-22 02:21:46,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:46,285 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 18750 transitions. [2020-12-22 02:21:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2283 [2020-12-22 02:21:46,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:46,339 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 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 02:21:46,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 02:21:46,554 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:46,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1049141906, now seen corresponding path program 1 times [2020-12-22 02:21:46,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:46,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627355076] [2020-12-22 02:21:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9284 backedges. 5583 proven. 1210 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2020-12-22 02:21:51,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627355076] [2020-12-22 02:21:51,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514948337] [2020-12-22 02:21:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:52,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 2622 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:21:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:53,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:21:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9284 backedges. 5646 proven. 250 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2020-12-22 02:21:59,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:21:59,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-12-22 02:21:59,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511153153] [2020-12-22 02:21:59,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:21:59,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:59,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:21:59,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:21:59,162 INFO L87 Difference]: Start difference. First operand 18428 states and 18750 transitions. Second operand 7 states. [2020-12-22 02:22:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:07,863 INFO L93 Difference]: Finished difference Result 38828 states and 39496 transitions. [2020-12-22 02:22:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 02:22:07,864 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 2282 [2020-12-22 02:22:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:07,884 INFO L225 Difference]: With dead ends: 38828 [2020-12-22 02:22:07,885 INFO L226 Difference]: Without dead ends: 20731 [2020-12-22 02:22:07,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2295 GetRequests, 2286 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-22 02:22:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20731 states. [2020-12-22 02:22:08,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20731 to 18099. [2020-12-22 02:22:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18099 states. [2020-12-22 02:22:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18099 states to 18099 states and 18380 transitions. [2020-12-22 02:22:08,104 INFO L78 Accepts]: Start accepts. Automaton has 18099 states and 18380 transitions. Word has length 2282 [2020-12-22 02:22:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:08,105 INFO L481 AbstractCegarLoop]: Abstraction has 18099 states and 18380 transitions. [2020-12-22 02:22:08,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:22:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 18099 states and 18380 transitions. [2020-12-22 02:22:08,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2297 [2020-12-22 02:22:08,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:08,157 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:08,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:22:08,368 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:08,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:08,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1839817152, now seen corresponding path program 1 times [2020-12-22 02:22:08,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:08,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404207700] [2020-12-22 02:22:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10016 backedges. 6658 proven. 0 refuted. 0 times theorem prover too weak. 3358 trivial. 0 not checked. [2020-12-22 02:22:14,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404207700] [2020-12-22 02:22:14,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:14,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 02:22:14,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235022515] [2020-12-22 02:22:14,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:22:14,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:14,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:22:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:22:14,231 INFO L87 Difference]: Start difference. First operand 18099 states and 18380 transitions. Second operand 7 states. [2020-12-22 02:22:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:23,914 INFO L93 Difference]: Finished difference Result 50230 states and 51032 transitions. [2020-12-22 02:22:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 02:22:23,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 2296 [2020-12-22 02:22:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:23,946 INFO L225 Difference]: With dead ends: 50230 [2020-12-22 02:22:23,947 INFO L226 Difference]: Without dead ends: 32462 [2020-12-22 02:22:23,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-12-22 02:22:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32462 states. [2020-12-22 02:22:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32462 to 18099. [2020-12-22 02:22:24,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18099 states. [2020-12-22 02:22:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18099 states to 18099 states and 18379 transitions. [2020-12-22 02:22:24,324 INFO L78 Accepts]: Start accepts. Automaton has 18099 states and 18379 transitions. Word has length 2296 [2020-12-22 02:22:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:24,325 INFO L481 AbstractCegarLoop]: Abstraction has 18099 states and 18379 transitions. [2020-12-22 02:22:24,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:22:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 18099 states and 18379 transitions. [2020-12-22 02:22:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2324 [2020-12-22 02:22:24,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:24,381 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:24,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 02:22:24,382 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:24,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1067836632, now seen corresponding path program 1 times [2020-12-22 02:22:24,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:24,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274162576] [2020-12-22 02:22:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10306 backedges. 6212 proven. 0 refuted. 0 times theorem prover too weak. 4094 trivial. 0 not checked. [2020-12-22 02:22:28,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274162576] [2020-12-22 02:22:28,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:28,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:22:28,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333381700] [2020-12-22 02:22:28,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:22:28,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:28,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:22:28,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:22:28,238 INFO L87 Difference]: Start difference. First operand 18099 states and 18379 transitions. Second operand 4 states. [2020-12-22 02:22:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:31,431 INFO L93 Difference]: Finished difference Result 40144 states and 40754 transitions. [2020-12-22 02:22:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:22:31,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2323 [2020-12-22 02:22:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:31,452 INFO L225 Difference]: With dead ends: 40144 [2020-12-22 02:22:31,452 INFO L226 Difference]: Without dead ends: 22376 [2020-12-22 02:22:31,465 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 02:22:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22376 states. [2020-12-22 02:22:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22376 to 19086. [2020-12-22 02:22:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19086 states. [2020-12-22 02:22:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19086 states to 19086 states and 19370 transitions. [2020-12-22 02:22:31,672 INFO L78 Accepts]: Start accepts. Automaton has 19086 states and 19370 transitions. Word has length 2323 [2020-12-22 02:22:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:31,673 INFO L481 AbstractCegarLoop]: Abstraction has 19086 states and 19370 transitions. [2020-12-22 02:22:31,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:22:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19086 states and 19370 transitions. [2020-12-22 02:22:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2335 [2020-12-22 02:22:31,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:31,711 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:31,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 02:22:31,712 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1888165697, now seen corresponding path program 1 times [2020-12-22 02:22:31,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:31,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930279216] [2020-12-22 02:22:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10369 backedges. 4531 proven. 630 refuted. 0 times theorem prover too weak. 5208 trivial. 0 not checked. [2020-12-22 02:22:39,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930279216] [2020-12-22 02:22:39,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110943127] [2020-12-22 02:22:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:22:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:40,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 2715 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:22:40,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:22:42,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:22:42,147 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:22:42,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:22:42,154 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:22:42,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:22:42,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:22:42,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:22:42,178 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 02:22:42,192 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:22:42,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:22:42,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:22:42,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 02:22:42,231 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:22:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10369 backedges. 5891 proven. 0 refuted. 0 times theorem prover too weak. 4478 trivial. 0 not checked. [2020-12-22 02:22:45,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:22:45,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2020-12-22 02:22:45,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564891302] [2020-12-22 02:22:45,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:22:45,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:45,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:22:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:22:45,752 INFO L87 Difference]: Start difference. First operand 19086 states and 19370 transitions. Second operand 4 states. [2020-12-22 02:22:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:48,546 INFO L93 Difference]: Finished difference Result 38828 states and 39414 transitions. [2020-12-22 02:22:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:22:48,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2334 [2020-12-22 02:22:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:48,570 INFO L225 Difference]: With dead ends: 38828 [2020-12-22 02:22:48,570 INFO L226 Difference]: Without dead ends: 20073 [2020-12-22 02:22:48,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2342 GetRequests, 2335 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:22:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20073 states. [2020-12-22 02:22:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20073 to 19415. [2020-12-22 02:22:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19415 states. [2020-12-22 02:22:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19415 states to 19415 states and 19703 transitions. [2020-12-22 02:22:48,946 INFO L78 Accepts]: Start accepts. Automaton has 19415 states and 19703 transitions. Word has length 2334 [2020-12-22 02:22:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:48,947 INFO L481 AbstractCegarLoop]: Abstraction has 19415 states and 19703 transitions. [2020-12-22 02:22:48,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:22:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 19415 states and 19703 transitions. [2020-12-22 02:22:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2464 [2020-12-22 02:22:49,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:49,006 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:49,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:22:49,208 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:49,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1361073903, now seen corresponding path program 1 times [2020-12-22 02:22:49,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:49,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526651032] [2020-12-22 02:22:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11226 backedges. 4915 proven. 630 refuted. 0 times theorem prover too weak. 5681 trivial. 0 not checked. [2020-12-22 02:22:57,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526651032] [2020-12-22 02:22:57,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057861691] [2020-12-22 02:22:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:22:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:58,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 2844 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:22:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:23:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11226 backedges. 6748 proven. 0 refuted. 0 times theorem prover too weak. 4478 trivial. 0 not checked. [2020-12-22 02:23:03,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:23:03,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2020-12-22 02:23:03,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801058836] [2020-12-22 02:23:03,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:23:03,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:03,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:23:03,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:23:03,620 INFO L87 Difference]: Start difference. First operand 19415 states and 19703 transitions. Second operand 4 states. [2020-12-22 02:23:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:23:06,903 INFO L93 Difference]: Finished difference Result 38828 states and 39407 transitions. [2020-12-22 02:23:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:23:06,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2463 [2020-12-22 02:23:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:23:06,926 INFO L225 Difference]: With dead ends: 38828 [2020-12-22 02:23:06,927 INFO L226 Difference]: Without dead ends: 19744 [2020-12-22 02:23:06,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2471 GetRequests, 2464 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:23:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2020-12-22 02:23:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 19086. [2020-12-22 02:23:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19086 states. [2020-12-22 02:23:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19086 states to 19086 states and 19364 transitions. [2020-12-22 02:23:07,156 INFO L78 Accepts]: Start accepts. Automaton has 19086 states and 19364 transitions. Word has length 2463 [2020-12-22 02:23:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:23:07,158 INFO L481 AbstractCegarLoop]: Abstraction has 19086 states and 19364 transitions. [2020-12-22 02:23:07,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:23:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 19086 states and 19364 transitions. [2020-12-22 02:23:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2482 [2020-12-22 02:23:07,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:23:07,204 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 1, 1, 1, 1, 1, 1, 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 02:23:07,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:23:07,410 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:23:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:23:07,412 INFO L82 PathProgramCache]: Analyzing trace with hash 255337764, now seen corresponding path program 1 times [2020-12-22 02:23:07,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:23:07,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995307263] [2020-12-22 02:23:07,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:23:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11586 backedges. 4785 proven. 0 refuted. 0 times theorem prover too weak. 6801 trivial. 0 not checked. [2020-12-22 02:23:11,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995307263] [2020-12-22 02:23:11,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:23:11,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:23:11,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122023396] [2020-12-22 02:23:11,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:23:11,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:11,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:23:11,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:23:11,659 INFO L87 Difference]: Start difference. First operand 19086 states and 19364 transitions. Second operand 3 states. [2020-12-22 02:23:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:23:13,988 INFO L93 Difference]: Finished difference Result 42118 states and 42731 transitions. [2020-12-22 02:23:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:23:13,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2481 [2020-12-22 02:23:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:23:14,014 INFO L225 Difference]: With dead ends: 42118 [2020-12-22 02:23:14,014 INFO L226 Difference]: Without dead ends: 23363 [2020-12-22 02:23:14,030 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 02:23:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23363 states. [2020-12-22 02:23:14,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23363 to 19415. [2020-12-22 02:23:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19415 states. [2020-12-22 02:23:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19415 states to 19415 states and 19696 transitions. [2020-12-22 02:23:14,292 INFO L78 Accepts]: Start accepts. Automaton has 19415 states and 19696 transitions. Word has length 2481 [2020-12-22 02:23:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:23:14,292 INFO L481 AbstractCegarLoop]: Abstraction has 19415 states and 19696 transitions. [2020-12-22 02:23:14,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:23:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 19415 states and 19696 transitions. [2020-12-22 02:23:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2539 [2020-12-22 02:23:14,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:23:14,346 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 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, 7, 7, 7, 7, 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, 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, 1, 1, 1, 1, 1, 1, 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 02:23:14,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 02:23:14,346 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:23:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:23:14,348 INFO L82 PathProgramCache]: Analyzing trace with hash 896728296, now seen corresponding path program 1 times [2020-12-22 02:23:14,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:23:14,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597472821] [2020-12-22 02:23:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:23:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 02:23:23,698 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 02:23:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 02:23:24,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.