/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/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:20:34,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:20:34,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:20:34,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:20:34,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:20:34,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:20:34,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:20:34,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:20:34,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:20:34,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:20:34,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:20:34,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:20:34,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:20:34,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:20:34,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:20:34,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:20:34,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:20:34,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:20:34,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:20:34,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:20:34,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:20:34,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:20:34,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:20:34,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:20:34,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:20:34,514 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:20:34,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:20:34,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:20:34,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:20:34,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:20:34,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:20:34,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:20:34,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:20:34,516 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:20:34,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:20:34,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:20:34,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:20:34,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:20:34,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:20:34,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:20:34,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:20:34,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:20:34,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:20:34,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:20:34,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:20:34,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:20:34,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:20:34,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:20:34,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:20:34,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:20:34,947 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:20:34,948 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:20:34,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:20:35,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c7507f2e/44e9fa081bcd4681a10faef987126636/FLAGcaa77e3fb [2020-12-22 07:20:35,812 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:20:35,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:20:35,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c7507f2e/44e9fa081bcd4681a10faef987126636/FLAGcaa77e3fb [2020-12-22 07:20:36,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c7507f2e/44e9fa081bcd4681a10faef987126636 [2020-12-22 07:20:36,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:20:36,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:20:36,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:36,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:20:36,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:20:36,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f331a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36, skipping insertion in model container [2020-12-22 07:20:36,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:20:36,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:20:36,488 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/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2020-12-22 07:20:36,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:36,526 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:20:36,644 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/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2020-12-22 07:20:36,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:36,672 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:20:36,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36 WrapperNode [2020-12-22 07:20:36,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:36,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:36,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:20:36,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:20:36,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:36,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:20:36,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:20:36,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:20:36,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (1/1) ... [2020-12-22 07:20:36,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:20:36,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:20:36,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:20:36,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:20:36,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (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 07:20:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:20:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:20:36,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:20:36,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:20:37,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:20:37,814 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:20:37,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:37 BoogieIcfgContainer [2020-12-22 07:20:37,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:20:37,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:20:37,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:20:37,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:20:37,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:20:36" (1/3) ... [2020-12-22 07:20:37,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a32343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:37, skipping insertion in model container [2020-12-22 07:20:37,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:36" (2/3) ... [2020-12-22 07:20:37,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a32343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:37, skipping insertion in model container [2020-12-22 07:20:37,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:37" (3/3) ... [2020-12-22 07:20:37,826 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:20:37,834 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:20:37,840 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:20:37,863 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:20:37,895 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:20:37,895 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:20:37,895 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:20:37,895 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:20:37,896 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:20:37,896 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:20:37,896 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:20:37,896 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:20:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2020-12-22 07:20:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:37,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:37,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:37,948 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:37,955 INFO L82 PathProgramCache]: Analyzing trace with hash 298975739, now seen corresponding path program 1 times [2020-12-22 07:20:37,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:37,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964129508] [2020-12-22 07:20:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:38,230 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 07:20:38,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964129508] [2020-12-22 07:20:38,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:38,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:20:38,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80198721] [2020-12-22 07:20:38,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:20:38,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:20:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:20:38,262 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 2 states. [2020-12-22 07:20:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:38,305 INFO L93 Difference]: Finished difference Result 212 states and 365 transitions. [2020-12-22 07:20:38,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:20:38,307 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:20:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:38,320 INFO L225 Difference]: With dead ends: 212 [2020-12-22 07:20:38,320 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 07:20:38,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:20:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 07:20:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-22 07:20:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 07:20:38,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 228 transitions. [2020-12-22 07:20:38,379 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 228 transitions. Word has length 37 [2020-12-22 07:20:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:38,379 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 228 transitions. [2020-12-22 07:20:38,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:20:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 228 transitions. [2020-12-22 07:20:38,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:38,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:38,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:38,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:20:38,383 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash -518672711, now seen corresponding path program 1 times [2020-12-22 07:20:38,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:38,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538909477] [2020-12-22 07:20:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:38,530 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 07:20:38,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538909477] [2020-12-22 07:20:38,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:38,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:38,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745307156] [2020-12-22 07:20:38,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:38,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:38,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:38,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:38,535 INFO L87 Difference]: Start difference. First operand 132 states and 228 transitions. Second operand 5 states. [2020-12-22 07:20:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:38,632 INFO L93 Difference]: Finished difference Result 211 states and 358 transitions. [2020-12-22 07:20:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:20:38,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:20:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:38,635 INFO L225 Difference]: With dead ends: 211 [2020-12-22 07:20:38,635 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 07:20:38,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:20:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 07:20:38,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-22 07:20:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 07:20:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 201 transitions. [2020-12-22 07:20:38,650 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 201 transitions. Word has length 37 [2020-12-22 07:20:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:38,650 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 201 transitions. [2020-12-22 07:20:38,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 201 transitions. [2020-12-22 07:20:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:20:38,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:38,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:38,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:20:38,654 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:38,655 INFO L82 PathProgramCache]: Analyzing trace with hash -707453694, now seen corresponding path program 1 times [2020-12-22 07:20:38,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:38,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59305731] [2020-12-22 07:20:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:38,892 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 07:20:38,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59305731] [2020-12-22 07:20:38,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:38,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:38,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676212203] [2020-12-22 07:20:38,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:38,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:38,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:38,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:38,896 INFO L87 Difference]: Start difference. First operand 132 states and 201 transitions. Second operand 3 states. [2020-12-22 07:20:38,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:38,957 INFO L93 Difference]: Finished difference Result 273 states and 436 transitions. [2020-12-22 07:20:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:38,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:20:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:38,960 INFO L225 Difference]: With dead ends: 273 [2020-12-22 07:20:38,960 INFO L226 Difference]: Without dead ends: 198 [2020-12-22 07:20:38,961 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 07:20:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-22 07:20:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-12-22 07:20:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 07:20:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 302 transitions. [2020-12-22 07:20:38,977 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 302 transitions. Word has length 63 [2020-12-22 07:20:38,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:38,977 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 302 transitions. [2020-12-22 07:20:38,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:38,978 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 302 transitions. [2020-12-22 07:20:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:20:38,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:38,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:38,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:20:38,981 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:38,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1995563601, now seen corresponding path program 1 times [2020-12-22 07:20:38,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:38,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845509308] [2020-12-22 07:20:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:39,077 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 07:20:39,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845509308] [2020-12-22 07:20:39,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:39,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:39,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006580205] [2020-12-22 07:20:39,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:39,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:39,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:39,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:39,081 INFO L87 Difference]: Start difference. First operand 195 states and 302 transitions. Second operand 3 states. [2020-12-22 07:20:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:39,114 INFO L93 Difference]: Finished difference Result 457 states and 730 transitions. [2020-12-22 07:20:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:39,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:20:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:39,118 INFO L225 Difference]: With dead ends: 457 [2020-12-22 07:20:39,118 INFO L226 Difference]: Without dead ends: 319 [2020-12-22 07:20:39,119 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 07:20:39,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-12-22 07:20:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2020-12-22 07:20:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-12-22 07:20:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 496 transitions. [2020-12-22 07:20:39,144 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 496 transitions. Word has length 65 [2020-12-22 07:20:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:39,145 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 496 transitions. [2020-12-22 07:20:39,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 496 transitions. [2020-12-22 07:20:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:20:39,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:39,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:39,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:20:39,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:39,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2137075392, now seen corresponding path program 1 times [2020-12-22 07:20:39,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:39,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515939663] [2020-12-22 07:20:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:39,318 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 07:20:39,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515939663] [2020-12-22 07:20:39,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:39,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:39,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093814344] [2020-12-22 07:20:39,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:39,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:39,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:39,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:39,322 INFO L87 Difference]: Start difference. First operand 315 states and 496 transitions. Second operand 3 states. [2020-12-22 07:20:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:39,385 INFO L93 Difference]: Finished difference Result 803 states and 1286 transitions. [2020-12-22 07:20:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:39,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:20:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:39,390 INFO L225 Difference]: With dead ends: 803 [2020-12-22 07:20:39,390 INFO L226 Difference]: Without dead ends: 545 [2020-12-22 07:20:39,391 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 07:20:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-12-22 07:20:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 539. [2020-12-22 07:20:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-12-22 07:20:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 852 transitions. [2020-12-22 07:20:39,437 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 852 transitions. Word has length 67 [2020-12-22 07:20:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:39,440 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 852 transitions. [2020-12-22 07:20:39,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 852 transitions. [2020-12-22 07:20:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:20:39,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:39,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:39,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:20:39,444 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:39,445 INFO L82 PathProgramCache]: Analyzing trace with hash -544230961, now seen corresponding path program 1 times [2020-12-22 07:20:39,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:39,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016318163] [2020-12-22 07:20:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:39,655 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 07:20:39,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016318163] [2020-12-22 07:20:39,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:39,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:39,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94246142] [2020-12-22 07:20:39,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:39,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:39,662 INFO L87 Difference]: Start difference. First operand 539 states and 852 transitions. Second operand 5 states. [2020-12-22 07:20:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:39,874 INFO L93 Difference]: Finished difference Result 2303 states and 3746 transitions. [2020-12-22 07:20:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:20:39,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:20:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:39,886 INFO L225 Difference]: With dead ends: 2303 [2020-12-22 07:20:39,886 INFO L226 Difference]: Without dead ends: 1821 [2020-12-22 07:20:39,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:20:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2020-12-22 07:20:39,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 960. [2020-12-22 07:20:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960 states. [2020-12-22 07:20:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1532 transitions. [2020-12-22 07:20:39,940 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1532 transitions. Word has length 69 [2020-12-22 07:20:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:39,941 INFO L481 AbstractCegarLoop]: Abstraction has 960 states and 1532 transitions. [2020-12-22 07:20:39,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:39,941 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1532 transitions. [2020-12-22 07:20:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:20:39,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:39,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:39,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:20:39,944 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1614123231, now seen corresponding path program 1 times [2020-12-22 07:20:39,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:39,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369924493] [2020-12-22 07:20:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:40,027 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 07:20:40,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369924493] [2020-12-22 07:20:40,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:40,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:40,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590247147] [2020-12-22 07:20:40,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:40,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:40,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:40,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:40,032 INFO L87 Difference]: Start difference. First operand 960 states and 1532 transitions. Second operand 4 states. [2020-12-22 07:20:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:40,161 INFO L93 Difference]: Finished difference Result 2793 states and 4533 transitions. [2020-12-22 07:20:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:40,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 07:20:40,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:40,176 INFO L225 Difference]: With dead ends: 2793 [2020-12-22 07:20:40,176 INFO L226 Difference]: Without dead ends: 1890 [2020-12-22 07:20:40,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2020-12-22 07:20:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1416. [2020-12-22 07:20:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-12-22 07:20:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2275 transitions. [2020-12-22 07:20:40,256 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2275 transitions. Word has length 70 [2020-12-22 07:20:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:40,257 INFO L481 AbstractCegarLoop]: Abstraction has 1416 states and 2275 transitions. [2020-12-22 07:20:40,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2275 transitions. [2020-12-22 07:20:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:20:40,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:40,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:40,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:20:40,261 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:40,261 INFO L82 PathProgramCache]: Analyzing trace with hash -252040890, now seen corresponding path program 1 times [2020-12-22 07:20:40,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:40,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276266682] [2020-12-22 07:20:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:40,431 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 07:20:40,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276266682] [2020-12-22 07:20:40,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:40,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:40,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167782411] [2020-12-22 07:20:40,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:40,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:40,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:40,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:40,434 INFO L87 Difference]: Start difference. First operand 1416 states and 2275 transitions. Second operand 4 states. [2020-12-22 07:20:40,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:40,588 INFO L93 Difference]: Finished difference Result 4216 states and 6836 transitions. [2020-12-22 07:20:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:40,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:20:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:40,603 INFO L225 Difference]: With dead ends: 4216 [2020-12-22 07:20:40,603 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 07:20:40,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 07:20:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2067. [2020-12-22 07:20:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2067 states. [2020-12-22 07:20:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 3322 transitions. [2020-12-22 07:20:40,698 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 3322 transitions. Word has length 71 [2020-12-22 07:20:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:40,699 INFO L481 AbstractCegarLoop]: Abstraction has 2067 states and 3322 transitions. [2020-12-22 07:20:40,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:40,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 3322 transitions. [2020-12-22 07:20:40,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:40,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:40,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:40,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:20:40,702 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:40,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:40,702 INFO L82 PathProgramCache]: Analyzing trace with hash -630566449, now seen corresponding path program 1 times [2020-12-22 07:20:40,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:40,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769405584] [2020-12-22 07:20:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:40,752 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 07:20:40,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769405584] [2020-12-22 07:20:40,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:40,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:40,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324974037] [2020-12-22 07:20:40,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:40,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:40,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:40,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:40,755 INFO L87 Difference]: Start difference. First operand 2067 states and 3322 transitions. Second operand 3 states. [2020-12-22 07:20:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:40,872 INFO L93 Difference]: Finished difference Result 4274 states and 6880 transitions. [2020-12-22 07:20:40,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:40,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:20:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:40,890 INFO L225 Difference]: With dead ends: 4274 [2020-12-22 07:20:40,890 INFO L226 Difference]: Without dead ends: 3076 [2020-12-22 07:20:40,894 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 07:20:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2020-12-22 07:20:41,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3074. [2020-12-22 07:20:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3074 states. [2020-12-22 07:20:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 4900 transitions. [2020-12-22 07:20:41,054 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 4900 transitions. Word has length 72 [2020-12-22 07:20:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:41,055 INFO L481 AbstractCegarLoop]: Abstraction has 3074 states and 4900 transitions. [2020-12-22 07:20:41,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 4900 transitions. [2020-12-22 07:20:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:41,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:41,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:41,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:20:41,057 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash -808156936, now seen corresponding path program 1 times [2020-12-22 07:20:41,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:41,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138134973] [2020-12-22 07:20:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:41,112 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 07:20:41,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138134973] [2020-12-22 07:20:41,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:41,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:41,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542803740] [2020-12-22 07:20:41,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:41,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:41,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:41,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:41,115 INFO L87 Difference]: Start difference. First operand 3074 states and 4900 transitions. Second operand 4 states. [2020-12-22 07:20:41,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:41,378 INFO L93 Difference]: Finished difference Result 9240 states and 14853 transitions. [2020-12-22 07:20:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:41,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:20:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:41,412 INFO L225 Difference]: With dead ends: 9240 [2020-12-22 07:20:41,413 INFO L226 Difference]: Without dead ends: 6354 [2020-12-22 07:20:41,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6354 states. [2020-12-22 07:20:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6354 to 4698. [2020-12-22 07:20:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4698 states. [2020-12-22 07:20:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 7486 transitions. [2020-12-22 07:20:41,698 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 7486 transitions. Word has length 72 [2020-12-22 07:20:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:41,698 INFO L481 AbstractCegarLoop]: Abstraction has 4698 states and 7486 transitions. [2020-12-22 07:20:41,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 7486 transitions. [2020-12-22 07:20:41,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:41,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:41,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:41,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:20:41,700 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1968035874, now seen corresponding path program 1 times [2020-12-22 07:20:41,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:41,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627829606] [2020-12-22 07:20:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:41,746 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 07:20:41,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627829606] [2020-12-22 07:20:41,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:41,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:41,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842117407] [2020-12-22 07:20:41,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:41,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:41,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:41,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:41,749 INFO L87 Difference]: Start difference. First operand 4698 states and 7486 transitions. Second operand 3 states. [2020-12-22 07:20:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:42,027 INFO L93 Difference]: Finished difference Result 10286 states and 16464 transitions. [2020-12-22 07:20:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:42,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:20:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:42,065 INFO L225 Difference]: With dead ends: 10286 [2020-12-22 07:20:42,065 INFO L226 Difference]: Without dead ends: 6983 [2020-12-22 07:20:42,071 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 07:20:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6983 states. [2020-12-22 07:20:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6983 to 6981. [2020-12-22 07:20:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6981 states. [2020-12-22 07:20:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6981 states to 6981 states and 11071 transitions. [2020-12-22 07:20:42,433 INFO L78 Accepts]: Start accepts. Automaton has 6981 states and 11071 transitions. Word has length 72 [2020-12-22 07:20:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:42,433 INFO L481 AbstractCegarLoop]: Abstraction has 6981 states and 11071 transitions. [2020-12-22 07:20:42,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6981 states and 11071 transitions. [2020-12-22 07:20:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:42,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:42,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:42,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:20:42,435 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash 952039085, now seen corresponding path program 1 times [2020-12-22 07:20:42,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:42,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71045418] [2020-12-22 07:20:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:42,477 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 07:20:42,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71045418] [2020-12-22 07:20:42,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:42,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:42,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194455773] [2020-12-22 07:20:42,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:42,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:42,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:42,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:42,479 INFO L87 Difference]: Start difference. First operand 6981 states and 11071 transitions. Second operand 3 states. [2020-12-22 07:20:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:42,884 INFO L93 Difference]: Finished difference Result 15555 states and 24952 transitions. [2020-12-22 07:20:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:42,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:20:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:42,929 INFO L225 Difference]: With dead ends: 15555 [2020-12-22 07:20:42,929 INFO L226 Difference]: Without dead ends: 10468 [2020-12-22 07:20:42,940 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 07:20:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10468 states. [2020-12-22 07:20:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10468 to 10466. [2020-12-22 07:20:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10466 states. [2020-12-22 07:20:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10466 states to 10466 states and 16575 transitions. [2020-12-22 07:20:43,489 INFO L78 Accepts]: Start accepts. Automaton has 10466 states and 16575 transitions. Word has length 72 [2020-12-22 07:20:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:43,489 INFO L481 AbstractCegarLoop]: Abstraction has 10466 states and 16575 transitions. [2020-12-22 07:20:43,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 10466 states and 16575 transitions. [2020-12-22 07:20:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:20:43,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:43,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:43,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:20:43,491 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:43,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1377255792, now seen corresponding path program 1 times [2020-12-22 07:20:43,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:43,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816643905] [2020-12-22 07:20:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:43,660 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 07:20:43,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816643905] [2020-12-22 07:20:43,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:43,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:43,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652898389] [2020-12-22 07:20:43,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:43,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:43,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:43,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:43,663 INFO L87 Difference]: Start difference. First operand 10466 states and 16575 transitions. Second operand 4 states. [2020-12-22 07:20:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:44,697 INFO L93 Difference]: Finished difference Result 31026 states and 49119 transitions. [2020-12-22 07:20:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:44,698 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:20:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:44,755 INFO L225 Difference]: With dead ends: 31026 [2020-12-22 07:20:44,755 INFO L226 Difference]: Without dead ends: 20569 [2020-12-22 07:20:44,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20569 states. [2020-12-22 07:20:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20569 to 20567. [2020-12-22 07:20:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20567 states. [2020-12-22 07:20:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20567 states to 20567 states and 32332 transitions. [2020-12-22 07:20:45,813 INFO L78 Accepts]: Start accepts. Automaton has 20567 states and 32332 transitions. Word has length 74 [2020-12-22 07:20:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:45,815 INFO L481 AbstractCegarLoop]: Abstraction has 20567 states and 32332 transitions. [2020-12-22 07:20:45,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:45,816 INFO L276 IsEmpty]: Start isEmpty. Operand 20567 states and 32332 transitions. [2020-12-22 07:20:45,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:20:45,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:45,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:45,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:20:45,817 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1916429764, now seen corresponding path program 1 times [2020-12-22 07:20:45,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:45,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30928791] [2020-12-22 07:20:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:45,851 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 07:20:45,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30928791] [2020-12-22 07:20:45,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:45,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:45,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865106474] [2020-12-22 07:20:45,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:45,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:45,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:45,853 INFO L87 Difference]: Start difference. First operand 20567 states and 32332 transitions. Second operand 3 states. [2020-12-22 07:20:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:47,433 INFO L93 Difference]: Finished difference Result 61663 states and 96934 transitions. [2020-12-22 07:20:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:47,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 07:20:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:47,559 INFO L225 Difference]: With dead ends: 61663 [2020-12-22 07:20:47,559 INFO L226 Difference]: Without dead ends: 41124 [2020-12-22 07:20:47,597 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 07:20:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41124 states. [2020-12-22 07:20:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41124 to 20569. [2020-12-22 07:20:49,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20569 states. [2020-12-22 07:20:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20569 states to 20569 states and 32334 transitions. [2020-12-22 07:20:49,179 INFO L78 Accepts]: Start accepts. Automaton has 20569 states and 32334 transitions. Word has length 75 [2020-12-22 07:20:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:49,179 INFO L481 AbstractCegarLoop]: Abstraction has 20569 states and 32334 transitions. [2020-12-22 07:20:49,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:49,179 INFO L276 IsEmpty]: Start isEmpty. Operand 20569 states and 32334 transitions. [2020-12-22 07:20:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:49,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:49,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:49,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:20:49,184 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:49,186 INFO L82 PathProgramCache]: Analyzing trace with hash 539922453, now seen corresponding path program 1 times [2020-12-22 07:20:49,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:49,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410103516] [2020-12-22 07:20:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:49,434 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 07:20:49,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410103516] [2020-12-22 07:20:49,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:49,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:49,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530612320] [2020-12-22 07:20:49,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:49,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:49,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:49,436 INFO L87 Difference]: Start difference. First operand 20569 states and 32334 transitions. Second operand 4 states. [2020-12-22 07:20:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:51,122 INFO L93 Difference]: Finished difference Result 60967 states and 95802 transitions. [2020-12-22 07:20:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:51,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:51,207 INFO L225 Difference]: With dead ends: 60967 [2020-12-22 07:20:51,208 INFO L226 Difference]: Without dead ends: 40410 [2020-12-22 07:20:51,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40410 states. [2020-12-22 07:20:53,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40410 to 40408. [2020-12-22 07:20:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40408 states. [2020-12-22 07:20:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40408 states to 40408 states and 63033 transitions. [2020-12-22 07:20:53,298 INFO L78 Accepts]: Start accepts. Automaton has 40408 states and 63033 transitions. Word has length 76 [2020-12-22 07:20:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:53,298 INFO L481 AbstractCegarLoop]: Abstraction has 40408 states and 63033 transitions. [2020-12-22 07:20:53,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 40408 states and 63033 transitions. [2020-12-22 07:20:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:53,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:53,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:53,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:20:53,301 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:53,301 INFO L82 PathProgramCache]: Analyzing trace with hash 31107364, now seen corresponding path program 1 times [2020-12-22 07:20:53,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:53,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682264422] [2020-12-22 07:20:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:53,383 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 07:20:53,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682264422] [2020-12-22 07:20:53,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:53,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:53,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851622151] [2020-12-22 07:20:53,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:53,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:53,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:53,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:53,386 INFO L87 Difference]: Start difference. First operand 40408 states and 63033 transitions. Second operand 4 states. [2020-12-22 07:20:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:56,109 INFO L93 Difference]: Finished difference Result 119716 states and 186647 transitions. [2020-12-22 07:20:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:56,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:56,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:56,332 INFO L225 Difference]: With dead ends: 119716 [2020-12-22 07:20:56,333 INFO L226 Difference]: Without dead ends: 79354 [2020-12-22 07:20:56,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79354 states. [2020-12-22 07:20:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79354 to 79352. [2020-12-22 07:20:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79352 states. [2020-12-22 07:20:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79352 states to 79352 states and 122783 transitions. [2020-12-22 07:20:59,691 INFO L78 Accepts]: Start accepts. Automaton has 79352 states and 122783 transitions. Word has length 76 [2020-12-22 07:20:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:59,692 INFO L481 AbstractCegarLoop]: Abstraction has 79352 states and 122783 transitions. [2020-12-22 07:20:59,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 79352 states and 122783 transitions. [2020-12-22 07:20:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:20:59,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:59,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:59,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:20:59,695 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:59,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1176909096, now seen corresponding path program 1 times [2020-12-22 07:20:59,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:59,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037989315] [2020-12-22 07:20:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:59,727 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 07:20:59,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037989315] [2020-12-22 07:20:59,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:59,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:59,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097003491] [2020-12-22 07:20:59,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:59,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:59,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:59,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:59,730 INFO L87 Difference]: Start difference. First operand 79352 states and 122783 transitions. Second operand 3 states. [2020-12-22 07:21:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:04,734 INFO L93 Difference]: Finished difference Result 237932 states and 368157 transitions. [2020-12-22 07:21:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:04,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:21:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:05,097 INFO L225 Difference]: With dead ends: 237932 [2020-12-22 07:21:05,097 INFO L226 Difference]: Without dead ends: 158654 [2020-12-22 07:21:05,419 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 07:21:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158654 states. [2020-12-22 07:21:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158654 to 79360. [2020-12-22 07:21:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79360 states. [2020-12-22 07:21:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79360 states to 79360 states and 122791 transitions. [2020-12-22 07:21:09,452 INFO L78 Accepts]: Start accepts. Automaton has 79360 states and 122791 transitions. Word has length 77 [2020-12-22 07:21:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:09,452 INFO L481 AbstractCegarLoop]: Abstraction has 79360 states and 122791 transitions. [2020-12-22 07:21:09,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 79360 states and 122791 transitions. [2020-12-22 07:21:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:21:09,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:09,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:09,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:21:09,454 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:09,454 INFO L82 PathProgramCache]: Analyzing trace with hash 604186441, now seen corresponding path program 1 times [2020-12-22 07:21:09,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:09,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648762727] [2020-12-22 07:21:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:09,549 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 07:21:09,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648762727] [2020-12-22 07:21:09,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:09,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:09,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113533374] [2020-12-22 07:21:09,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:09,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:09,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:09,552 INFO L87 Difference]: Start difference. First operand 79360 states and 122791 transitions. Second operand 4 states. [2020-12-22 07:21:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:14,996 INFO L93 Difference]: Finished difference Result 235108 states and 363554 transitions. [2020-12-22 07:21:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:14,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:21:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:15,480 INFO L225 Difference]: With dead ends: 235108 [2020-12-22 07:21:15,481 INFO L226 Difference]: Without dead ends: 155803 [2020-12-22 07:21:15,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155803 states. [2020-12-22 07:21:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155803 to 155801. [2020-12-22 07:21:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155801 states. [2020-12-22 07:21:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155801 states to 155801 states and 239045 transitions. [2020-12-22 07:21:22,604 INFO L78 Accepts]: Start accepts. Automaton has 155801 states and 239045 transitions. Word has length 78 [2020-12-22 07:21:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:22,604 INFO L481 AbstractCegarLoop]: Abstraction has 155801 states and 239045 transitions. [2020-12-22 07:21:22,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 155801 states and 239045 transitions. [2020-12-22 07:21:22,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:21:22,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:22,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:22,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:21:22,609 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash 120131000, now seen corresponding path program 1 times [2020-12-22 07:21:22,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:22,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856599433] [2020-12-22 07:21:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:22,753 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 07:21:22,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856599433] [2020-12-22 07:21:22,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:22,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045917798] [2020-12-22 07:21:22,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:22,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:22,758 INFO L87 Difference]: Start difference. First operand 155801 states and 239045 transitions. Second operand 4 states. [2020-12-22 07:21:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:34,154 INFO L93 Difference]: Finished difference Result 461429 states and 707439 transitions. [2020-12-22 07:21:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:34,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:21:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:34,823 INFO L225 Difference]: With dead ends: 461429 [2020-12-22 07:21:34,823 INFO L226 Difference]: Without dead ends: 305787 [2020-12-22 07:21:34,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305787 states. [2020-12-22 07:21:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305787 to 305785. [2020-12-22 07:21:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305785 states. [2020-12-22 07:21:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305785 states to 305785 states and 465045 transitions. [2020-12-22 07:21:48,983 INFO L78 Accepts]: Start accepts. Automaton has 305785 states and 465045 transitions. Word has length 78 [2020-12-22 07:21:48,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:48,983 INFO L481 AbstractCegarLoop]: Abstraction has 305785 states and 465045 transitions. [2020-12-22 07:21:48,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 305785 states and 465045 transitions. [2020-12-22 07:21:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:21:48,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:48,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:21:48,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:21:48,991 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:48,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:48,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1883818476, now seen corresponding path program 1 times [2020-12-22 07:21:48,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:48,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190228055] [2020-12-22 07:21:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:49,036 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 07:21:49,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190228055] [2020-12-22 07:21:49,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:49,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:49,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099302478] [2020-12-22 07:21:49,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:49,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:49,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:49,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:49,038 INFO L87 Difference]: Start difference. First operand 305785 states and 465045 transitions. Second operand 3 states. [2020-12-22 07:22:12,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:12,401 INFO L93 Difference]: Finished difference Result 916061 states and 1393543 transitions. [2020-12-22 07:22:12,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:12,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:22:12,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:14,152 INFO L225 Difference]: With dead ends: 916061 [2020-12-22 07:22:14,152 INFO L226 Difference]: Without dead ends: 611339 [2020-12-22 07:22:14,490 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 07:22:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611339 states. [2020-12-22 07:22:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611339 to 305817. [2020-12-22 07:22:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305817 states. [2020-12-22 07:22:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305817 states to 305817 states and 465077 transitions. [2020-12-22 07:22:35,154 INFO L78 Accepts]: Start accepts. Automaton has 305817 states and 465077 transitions. Word has length 79 [2020-12-22 07:22:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:35,154 INFO L481 AbstractCegarLoop]: Abstraction has 305817 states and 465077 transitions. [2020-12-22 07:22:35,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 305817 states and 465077 transitions. [2020-12-22 07:22:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:22:35,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:35,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:22:35,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:22:35,179 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:35,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:35,191 INFO L82 PathProgramCache]: Analyzing trace with hash 809988221, now seen corresponding path program 1 times [2020-12-22 07:22:35,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:35,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164032399] [2020-12-22 07:22:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:35,422 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 07:22:35,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164032399] [2020-12-22 07:22:35,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:35,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:35,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908509669] [2020-12-22 07:22:35,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:35,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:35,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:35,427 INFO L87 Difference]: Start difference. First operand 305817 states and 465077 transitions. Second operand 4 states. [2020-12-22 07:23:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:02,384 INFO L93 Difference]: Finished difference Result 905584 states and 1376019 transitions. [2020-12-22 07:23:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:02,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 07:23:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:04,181 INFO L225 Difference]: With dead ends: 905584 [2020-12-22 07:23:04,181 INFO L226 Difference]: Without dead ends: 600018 [2020-12-22 07:23:04,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600018 states. [2020-12-22 07:23:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600018 to 600016. [2020-12-22 07:23:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600016 states. [2020-12-22 07:23:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600016 states to 600016 states and 904133 transitions. [2020-12-22 07:23:41,180 INFO L78 Accepts]: Start accepts. Automaton has 600016 states and 904133 transitions. Word has length 80 [2020-12-22 07:23:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:41,181 INFO L481 AbstractCegarLoop]: Abstraction has 600016 states and 904133 transitions. [2020-12-22 07:23:41,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 600016 states and 904133 transitions. [2020-12-22 07:23:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:23:41,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:41,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:41,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:23:41,210 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:41,211 INFO L82 PathProgramCache]: Analyzing trace with hash -715330484, now seen corresponding path program 1 times [2020-12-22 07:23:41,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:41,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759763768] [2020-12-22 07:23:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:41,326 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 07:23:41,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759763768] [2020-12-22 07:23:41,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:41,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:41,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001512617] [2020-12-22 07:23:41,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:41,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:41,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:41,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:41,333 INFO L87 Difference]: Start difference. First operand 600016 states and 904133 transitions. Second operand 4 states.