/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-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:04:38,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:04:38,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:04:38,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 08:04:38,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:04:38,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:04:38,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:04:38,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:04:38,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:04:38,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:04:38,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:04:38,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:04:38,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:04:38,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:04:38,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:04:38,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:04:38,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:04:38,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:04:38,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:04:38,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:04:38,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:04:38,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:04:38,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:04:38,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:04:38,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:04:38,902 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:04:38,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:04:38,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:04:38,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:04:38,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:04:38,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:04:38,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:04:38,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:04:38,904 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:04:38,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:04:38,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:04:38,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:04:38,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:04:38,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:04:38,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:04:38,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:04:38,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:04:38,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:04:38,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:04:38,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:04:38,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:04:38,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:04:39,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:04:39,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:04:39,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:04:39,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:04:39,392 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:04:39,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:04:39,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3592b9325/766054ecbaf0415c8dc0ed80ab22485b/FLAGd8bddc1f3 [2020-12-22 08:04:40,341 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:04:40,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:04:40,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3592b9325/766054ecbaf0415c8dc0ed80ab22485b/FLAGd8bddc1f3 [2020-12-22 08:04:40,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3592b9325/766054ecbaf0415c8dc0ed80ab22485b [2020-12-22 08:04:40,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:04:40,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:04:40,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:04:40,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:04:40,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:04:40,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:40" (1/1) ... [2020-12-22 08:04:40,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2625151a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:40, skipping insertion in model container [2020-12-22 08:04:40,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:40" (1/1) ... [2020-12-22 08:04:40,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:04:40,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:04:40,953 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-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[6831,6844] [2020-12-22 08:04:40,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:04:41,014 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:04:41,089 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-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[6831,6844] [2020-12-22 08:04:41,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:04:41,157 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:04:41,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41 WrapperNode [2020-12-22 08:04:41,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:04:41,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:04:41,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:04:41,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:04:41,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (1/1) ... [2020-12-22 08:04:41,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (1/1) ... [2020-12-22 08:04:41,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:04:41,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:04:41,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:04:41,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:04:41,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (1/1) ... [2020-12-22 08:04:41,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (1/1) ... [2020-12-22 08:04:41,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (1/1) ... [2020-12-22 08:04:41,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (1/1) ... [2020-12-22 08:04:41,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (1/1) ... [2020-12-22 08:04:41,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (1/1) ... [2020-12-22 08:04:41,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (1/1) ... [2020-12-22 08:04:41,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:04:41,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:04:41,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:04:41,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:04:41,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (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 08:04:41,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:04:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:04:41,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:04:41,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:04:42,458 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:04:42,458 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:04:42,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:42 BoogieIcfgContainer [2020-12-22 08:04:42,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:04:42,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:04:42,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:04:42,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:04:42,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:04:40" (1/3) ... [2020-12-22 08:04:42,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a07e0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:42, skipping insertion in model container [2020-12-22 08:04:42,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:41" (2/3) ... [2020-12-22 08:04:42,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a07e0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:42, skipping insertion in model container [2020-12-22 08:04:42,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:42" (3/3) ... [2020-12-22 08:04:42,472 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-12-22 08:04:42,480 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:04:42,486 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:04:42,507 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:04:42,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:04:42,539 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:04:42,539 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:04:42,539 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:04:42,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:04:42,540 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:04:42,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:04:42,540 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:04:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states. [2020-12-22 08:04:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:04:42,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:42,577 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] [2020-12-22 08:04:42,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:42,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1933157835, now seen corresponding path program 1 times [2020-12-22 08:04:42,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:42,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661878512] [2020-12-22 08:04:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:43,105 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 08:04:43,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661878512] [2020-12-22 08:04:43,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:43,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:43,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103049318] [2020-12-22 08:04:43,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:43,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:43,143 INFO L87 Difference]: Start difference. First operand 135 states. Second operand 3 states. [2020-12-22 08:04:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:43,254 INFO L93 Difference]: Finished difference Result 278 states and 475 transitions. [2020-12-22 08:04:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:43,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 08:04:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:43,273 INFO L225 Difference]: With dead ends: 278 [2020-12-22 08:04:43,273 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 08:04:43,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:04:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 08:04:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2020-12-22 08:04:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 08:04:43,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 297 transitions. [2020-12-22 08:04:43,342 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 297 transitions. Word has length 57 [2020-12-22 08:04:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:43,343 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 297 transitions. [2020-12-22 08:04:43,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 297 transitions. [2020-12-22 08:04:43,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:04:43,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:43,350 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] [2020-12-22 08:04:43,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:04:43,351 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1883490782, now seen corresponding path program 1 times [2020-12-22 08:04:43,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:43,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564773085] [2020-12-22 08:04:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:43,529 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 08:04:43,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564773085] [2020-12-22 08:04:43,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:43,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:43,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795224620] [2020-12-22 08:04:43,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:43,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:43,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:43,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:43,534 INFO L87 Difference]: Start difference. First operand 189 states and 297 transitions. Second operand 3 states. [2020-12-22 08:04:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:43,629 INFO L93 Difference]: Finished difference Result 445 states and 721 transitions. [2020-12-22 08:04:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:43,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 08:04:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:43,634 INFO L225 Difference]: With dead ends: 445 [2020-12-22 08:04:43,635 INFO L226 Difference]: Without dead ends: 310 [2020-12-22 08:04:43,637 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 08:04:43,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-22 08:04:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2020-12-22 08:04:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-12-22 08:04:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 493 transitions. [2020-12-22 08:04:43,677 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 493 transitions. Word has length 59 [2020-12-22 08:04:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:43,678 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 493 transitions. [2020-12-22 08:04:43,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 493 transitions. [2020-12-22 08:04:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:04:43,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:43,682 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] [2020-12-22 08:04:43,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:04:43,683 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:43,684 INFO L82 PathProgramCache]: Analyzing trace with hash -111872728, now seen corresponding path program 1 times [2020-12-22 08:04:43,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:43,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534323990] [2020-12-22 08:04:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:43,835 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 08:04:43,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534323990] [2020-12-22 08:04:43,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:43,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:43,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530665737] [2020-12-22 08:04:43,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:43,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:43,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:43,842 INFO L87 Difference]: Start difference. First operand 308 states and 493 transitions. Second operand 3 states. [2020-12-22 08:04:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:43,941 INFO L93 Difference]: Finished difference Result 563 states and 917 transitions. [2020-12-22 08:04:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:43,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:04:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:43,950 INFO L225 Difference]: With dead ends: 563 [2020-12-22 08:04:43,950 INFO L226 Difference]: Without dead ends: 428 [2020-12-22 08:04:43,955 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 08:04:43,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-12-22 08:04:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 426. [2020-12-22 08:04:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2020-12-22 08:04:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 687 transitions. [2020-12-22 08:04:43,995 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 687 transitions. Word has length 61 [2020-12-22 08:04:43,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:43,996 INFO L481 AbstractCegarLoop]: Abstraction has 426 states and 687 transitions. [2020-12-22 08:04:43,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:43,996 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 687 transitions. [2020-12-22 08:04:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:04:43,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:43,999 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] [2020-12-22 08:04:43,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:04:43,999 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:44,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1275396395, now seen corresponding path program 1 times [2020-12-22 08:04:44,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:44,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020522095] [2020-12-22 08:04:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:44,151 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 08:04:44,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020522095] [2020-12-22 08:04:44,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:44,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:44,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746988739] [2020-12-22 08:04:44,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:44,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:44,155 INFO L87 Difference]: Start difference. First operand 426 states and 687 transitions. Second operand 3 states. [2020-12-22 08:04:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:44,217 INFO L93 Difference]: Finished difference Result 1082 states and 1767 transitions. [2020-12-22 08:04:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:44,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:04:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:44,223 INFO L225 Difference]: With dead ends: 1082 [2020-12-22 08:04:44,223 INFO L226 Difference]: Without dead ends: 733 [2020-12-22 08:04:44,226 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 08:04:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2020-12-22 08:04:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 731. [2020-12-22 08:04:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-22 08:04:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1181 transitions. [2020-12-22 08:04:44,307 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1181 transitions. Word has length 61 [2020-12-22 08:04:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:44,307 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1181 transitions. [2020-12-22 08:04:44,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1181 transitions. [2020-12-22 08:04:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:04:44,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:44,311 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 08:04:44,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:04:44,311 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1280827262, now seen corresponding path program 1 times [2020-12-22 08:04:44,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:44,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433195086] [2020-12-22 08:04:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:44,492 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 08:04:44,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433195086] [2020-12-22 08:04:44,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:44,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:44,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820899219] [2020-12-22 08:04:44,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:44,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:44,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:44,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:44,498 INFO L87 Difference]: Start difference. First operand 731 states and 1181 transitions. Second operand 5 states. [2020-12-22 08:04:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:44,764 INFO L93 Difference]: Finished difference Result 3004 states and 4923 transitions. [2020-12-22 08:04:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:44,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:04:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:44,780 INFO L225 Difference]: With dead ends: 3004 [2020-12-22 08:04:44,781 INFO L226 Difference]: Without dead ends: 2350 [2020-12-22 08:04:44,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2020-12-22 08:04:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1385. [2020-12-22 08:04:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2020-12-22 08:04:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2237 transitions. [2020-12-22 08:04:44,916 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2237 transitions. Word has length 63 [2020-12-22 08:04:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:44,917 INFO L481 AbstractCegarLoop]: Abstraction has 1385 states and 2237 transitions. [2020-12-22 08:04:44,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2237 transitions. [2020-12-22 08:04:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:04:44,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:44,920 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] [2020-12-22 08:04:44,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:04:44,921 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:44,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1113443658, now seen corresponding path program 1 times [2020-12-22 08:04:44,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:44,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780204742] [2020-12-22 08:04:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:45,041 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 08:04:45,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780204742] [2020-12-22 08:04:45,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:45,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:45,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257326822] [2020-12-22 08:04:45,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:45,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:45,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:45,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:45,046 INFO L87 Difference]: Start difference. First operand 1385 states and 2237 transitions. Second operand 4 states. [2020-12-22 08:04:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:45,350 INFO L93 Difference]: Finished difference Result 4443 states and 7230 transitions. [2020-12-22 08:04:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:45,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-12-22 08:04:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:45,371 INFO L225 Difference]: With dead ends: 4443 [2020-12-22 08:04:45,372 INFO L226 Difference]: Without dead ends: 3137 [2020-12-22 08:04:45,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2020-12-22 08:04:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2575. [2020-12-22 08:04:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-12-22 08:04:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 4153 transitions. [2020-12-22 08:04:45,616 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 4153 transitions. Word has length 64 [2020-12-22 08:04:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:45,616 INFO L481 AbstractCegarLoop]: Abstraction has 2575 states and 4153 transitions. [2020-12-22 08:04:45,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 4153 transitions. [2020-12-22 08:04:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:04:45,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:45,620 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] [2020-12-22 08:04:45,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:04:45,621 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:45,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:45,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1248232611, now seen corresponding path program 1 times [2020-12-22 08:04:45,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:45,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63214413] [2020-12-22 08:04:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:45,741 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 08:04:45,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63214413] [2020-12-22 08:04:45,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:45,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:45,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212107243] [2020-12-22 08:04:45,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:45,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:45,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:45,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:45,746 INFO L87 Difference]: Start difference. First operand 2575 states and 4153 transitions. Second operand 3 states. [2020-12-22 08:04:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:46,019 INFO L93 Difference]: Finished difference Result 4939 states and 8007 transitions. [2020-12-22 08:04:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:46,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:04:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:46,041 INFO L225 Difference]: With dead ends: 4939 [2020-12-22 08:04:46,041 INFO L226 Difference]: Without dead ends: 3555 [2020-12-22 08:04:46,049 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 08:04:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2020-12-22 08:04:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 3553. [2020-12-22 08:04:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3553 states. [2020-12-22 08:04:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 5707 transitions. [2020-12-22 08:04:46,319 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 5707 transitions. Word has length 64 [2020-12-22 08:04:46,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:46,319 INFO L481 AbstractCegarLoop]: Abstraction has 3553 states and 5707 transitions. [2020-12-22 08:04:46,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 5707 transitions. [2020-12-22 08:04:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:04:46,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:46,322 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] [2020-12-22 08:04:46,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:04:46,323 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:46,324 INFO L82 PathProgramCache]: Analyzing trace with hash 616386787, now seen corresponding path program 1 times [2020-12-22 08:04:46,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:46,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996202921] [2020-12-22 08:04:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:46,393 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 08:04:46,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996202921] [2020-12-22 08:04:46,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:46,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:46,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13430081] [2020-12-22 08:04:46,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:46,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:46,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:46,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:46,397 INFO L87 Difference]: Start difference. First operand 3553 states and 5707 transitions. Second operand 3 states. [2020-12-22 08:04:46,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:46,833 INFO L93 Difference]: Finished difference Result 8360 states and 13539 transitions. [2020-12-22 08:04:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:46,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:04:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:46,866 INFO L225 Difference]: With dead ends: 8360 [2020-12-22 08:04:46,866 INFO L226 Difference]: Without dead ends: 4889 [2020-12-22 08:04:46,873 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 08:04:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4889 states. [2020-12-22 08:04:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4889 to 4887. [2020-12-22 08:04:47,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4887 states. [2020-12-22 08:04:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4887 states to 4887 states and 7908 transitions. [2020-12-22 08:04:47,257 INFO L78 Accepts]: Start accepts. Automaton has 4887 states and 7908 transitions. Word has length 64 [2020-12-22 08:04:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:47,258 INFO L481 AbstractCegarLoop]: Abstraction has 4887 states and 7908 transitions. [2020-12-22 08:04:47,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:04:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4887 states and 7908 transitions. [2020-12-22 08:04:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:04:47,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:47,266 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 08:04:47,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:04:47,266 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:47,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:47,267 INFO L82 PathProgramCache]: Analyzing trace with hash -214961207, now seen corresponding path program 1 times [2020-12-22 08:04:47,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:47,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820289418] [2020-12-22 08:04:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:47,360 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 08:04:47,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820289418] [2020-12-22 08:04:47,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:47,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:47,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770779186] [2020-12-22 08:04:47,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:47,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:47,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:47,372 INFO L87 Difference]: Start difference. First operand 4887 states and 7908 transitions. Second operand 4 states. [2020-12-22 08:04:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:48,002 INFO L93 Difference]: Finished difference Result 13998 states and 22772 transitions. [2020-12-22 08:04:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:48,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-12-22 08:04:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:48,081 INFO L225 Difference]: With dead ends: 13998 [2020-12-22 08:04:48,081 INFO L226 Difference]: Without dead ends: 9193 [2020-12-22 08:04:48,092 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 08:04:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2020-12-22 08:04:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 7815. [2020-12-22 08:04:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7815 states. [2020-12-22 08:04:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 12584 transitions. [2020-12-22 08:04:48,775 INFO L78 Accepts]: Start accepts. Automaton has 7815 states and 12584 transitions. Word has length 65 [2020-12-22 08:04:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:48,776 INFO L481 AbstractCegarLoop]: Abstraction has 7815 states and 12584 transitions. [2020-12-22 08:04:48,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 7815 states and 12584 transitions. [2020-12-22 08:04:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:04:48,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:48,777 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] [2020-12-22 08:04:48,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:04:48,778 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1872749021, now seen corresponding path program 1 times [2020-12-22 08:04:48,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:48,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087795243] [2020-12-22 08:04:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:48,921 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 08:04:48,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087795243] [2020-12-22 08:04:48,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:48,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:48,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340226609] [2020-12-22 08:04:48,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:48,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:48,929 INFO L87 Difference]: Start difference. First operand 7815 states and 12584 transitions. Second operand 4 states. [2020-12-22 08:04:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:49,944 INFO L93 Difference]: Finished difference Result 22755 states and 36805 transitions. [2020-12-22 08:04:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:49,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-12-22 08:04:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:49,989 INFO L225 Difference]: With dead ends: 22755 [2020-12-22 08:04:49,990 INFO L226 Difference]: Without dead ends: 15022 [2020-12-22 08:04:50,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15022 states. [2020-12-22 08:04:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15022 to 12299. [2020-12-22 08:04:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12299 states. [2020-12-22 08:04:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12299 states to 12299 states and 19696 transitions. [2020-12-22 08:04:50,982 INFO L78 Accepts]: Start accepts. Automaton has 12299 states and 19696 transitions. Word has length 66 [2020-12-22 08:04:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:50,983 INFO L481 AbstractCegarLoop]: Abstraction has 12299 states and 19696 transitions. [2020-12-22 08:04:50,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 12299 states and 19696 transitions. [2020-12-22 08:04:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:04:50,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:50,984 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] [2020-12-22 08:04:50,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:04:50,985 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1396799506, now seen corresponding path program 1 times [2020-12-22 08:04:50,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:50,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025982906] [2020-12-22 08:04:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:51,166 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 08:04:51,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025982906] [2020-12-22 08:04:51,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:51,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:04:51,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826128912] [2020-12-22 08:04:51,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:04:51,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:51,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:04:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:51,171 INFO L87 Difference]: Start difference. First operand 12299 states and 19696 transitions. Second operand 5 states. [2020-12-22 08:04:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:52,609 INFO L93 Difference]: Finished difference Result 29256 states and 47101 transitions. [2020-12-22 08:04:52,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:04:52,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-12-22 08:04:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:52,663 INFO L225 Difference]: With dead ends: 29256 [2020-12-22 08:04:52,663 INFO L226 Difference]: Without dead ends: 17039 [2020-12-22 08:04:52,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:04:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17039 states. [2020-12-22 08:04:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17039 to 12299. [2020-12-22 08:04:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12299 states. [2020-12-22 08:04:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12299 states to 12299 states and 19546 transitions. [2020-12-22 08:04:53,636 INFO L78 Accepts]: Start accepts. Automaton has 12299 states and 19546 transitions. Word has length 68 [2020-12-22 08:04:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:53,637 INFO L481 AbstractCegarLoop]: Abstraction has 12299 states and 19546 transitions. [2020-12-22 08:04:53,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:04:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 12299 states and 19546 transitions. [2020-12-22 08:04:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:04:53,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:53,638 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 08:04:53,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:04:53,639 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:53,639 INFO L82 PathProgramCache]: Analyzing trace with hash -164512453, now seen corresponding path program 1 times [2020-12-22 08:04:53,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:53,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597727611] [2020-12-22 08:04:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:53,754 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 08:04:53,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597727611] [2020-12-22 08:04:53,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:53,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:04:53,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883783562] [2020-12-22 08:04:53,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:04:53,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:53,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:04:53,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:04:53,757 INFO L87 Difference]: Start difference. First operand 12299 states and 19546 transitions. Second operand 4 states. [2020-12-22 08:04:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:55,272 INFO L93 Difference]: Finished difference Result 36403 states and 57839 transitions. [2020-12-22 08:04:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:04:55,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 08:04:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:04:55,345 INFO L225 Difference]: With dead ends: 36403 [2020-12-22 08:04:55,345 INFO L226 Difference]: Without dead ends: 24113 [2020-12-22 08:04:55,369 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 08:04:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24113 states. [2020-12-22 08:04:57,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24113 to 24111. [2020-12-22 08:04:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24111 states. [2020-12-22 08:04:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24111 states to 24111 states and 38102 transitions. [2020-12-22 08:04:57,278 INFO L78 Accepts]: Start accepts. Automaton has 24111 states and 38102 transitions. Word has length 71 [2020-12-22 08:04:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:04:57,278 INFO L481 AbstractCegarLoop]: Abstraction has 24111 states and 38102 transitions. [2020-12-22 08:04:57,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:04:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 24111 states and 38102 transitions. [2020-12-22 08:04:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:04:57,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:04:57,280 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 08:04:57,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:04:57,280 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:04:57,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:04:57,281 INFO L82 PathProgramCache]: Analyzing trace with hash 667892135, now seen corresponding path program 1 times [2020-12-22 08:04:57,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:04:57,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913826090] [2020-12-22 08:04:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:04:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:04:57,315 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 08:04:57,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913826090] [2020-12-22 08:04:57,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:04:57,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:04:57,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889460552] [2020-12-22 08:04:57,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:04:57,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:04:57,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:04:57,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:04:57,317 INFO L87 Difference]: Start difference. First operand 24111 states and 38102 transitions. Second operand 3 states. [2020-12-22 08:04:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:04:59,944 INFO L93 Difference]: Finished difference Result 72295 states and 114244 transitions. [2020-12-22 08:04:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:04:59,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 08:04:59,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:00,098 INFO L225 Difference]: With dead ends: 72295 [2020-12-22 08:05:00,099 INFO L226 Difference]: Without dead ends: 48212 [2020-12-22 08:05:00,298 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 08:05:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48212 states. [2020-12-22 08:05:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48212 to 24113. [2020-12-22 08:05:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24113 states. [2020-12-22 08:05:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24113 states to 24113 states and 38104 transitions. [2020-12-22 08:05:02,114 INFO L78 Accepts]: Start accepts. Automaton has 24113 states and 38104 transitions. Word has length 72 [2020-12-22 08:05:02,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:02,114 INFO L481 AbstractCegarLoop]: Abstraction has 24113 states and 38104 transitions. [2020-12-22 08:05:02,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 24113 states and 38104 transitions. [2020-12-22 08:05:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:05:02,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:02,115 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] [2020-12-22 08:05:02,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:05:02,116 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:02,119 INFO L82 PathProgramCache]: Analyzing trace with hash -808520295, now seen corresponding path program 1 times [2020-12-22 08:05:02,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:02,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22899627] [2020-12-22 08:05:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:02,201 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 08:05:02,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22899627] [2020-12-22 08:05:02,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:02,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:02,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771135391] [2020-12-22 08:05:02,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:02,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:02,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:02,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:02,203 INFO L87 Difference]: Start difference. First operand 24113 states and 38104 transitions. Second operand 3 states. [2020-12-22 08:05:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:05,368 INFO L93 Difference]: Finished difference Result 70655 states and 111703 transitions. [2020-12-22 08:05:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:05:05,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 08:05:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:05,485 INFO L225 Difference]: With dead ends: 70655 [2020-12-22 08:05:05,486 INFO L226 Difference]: Without dead ends: 46698 [2020-12-22 08:05:05,524 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 08:05:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46698 states. [2020-12-22 08:05:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46698 to 46696. [2020-12-22 08:05:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46696 states. [2020-12-22 08:05:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46696 states to 46696 states and 73259 transitions. [2020-12-22 08:05:09,041 INFO L78 Accepts]: Start accepts. Automaton has 46696 states and 73259 transitions. Word has length 73 [2020-12-22 08:05:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:09,042 INFO L481 AbstractCegarLoop]: Abstraction has 46696 states and 73259 transitions. [2020-12-22 08:05:09,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:05:09,042 INFO L276 IsEmpty]: Start isEmpty. Operand 46696 states and 73259 transitions. [2020-12-22 08:05:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:05:09,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:09,043 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] [2020-12-22 08:05:09,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:05:09,044 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:09,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1547459556, now seen corresponding path program 1 times [2020-12-22 08:05:09,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:09,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953379332] [2020-12-22 08:05:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:09,159 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 08:05:09,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953379332] [2020-12-22 08:05:09,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:09,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:05:09,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132089772] [2020-12-22 08:05:09,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:05:09,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:09,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:05:09,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:09,162 INFO L87 Difference]: Start difference. First operand 46696 states and 73259 transitions. Second operand 5 states. [2020-12-22 08:05:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:15,374 INFO L93 Difference]: Finished difference Result 137988 states and 216428 transitions. [2020-12-22 08:05:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:15,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-12-22 08:05:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:15,562 INFO L225 Difference]: With dead ends: 137988 [2020-12-22 08:05:15,563 INFO L226 Difference]: Without dead ends: 91306 [2020-12-22 08:05:15,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:05:15,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91306 states. [2020-12-22 08:05:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91306 to 91304. [2020-12-22 08:05:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91304 states. [2020-12-22 08:05:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91304 states to 91304 states and 142371 transitions. [2020-12-22 08:05:22,746 INFO L78 Accepts]: Start accepts. Automaton has 91304 states and 142371 transitions. Word has length 73 [2020-12-22 08:05:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:22,747 INFO L481 AbstractCegarLoop]: Abstraction has 91304 states and 142371 transitions. [2020-12-22 08:05:22,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:05:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 91304 states and 142371 transitions. [2020-12-22 08:05:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:05:22,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:22,749 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] [2020-12-22 08:05:22,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:05:22,749 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:22,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1975872346, now seen corresponding path program 1 times [2020-12-22 08:05:22,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:22,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267420482] [2020-12-22 08:05:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:22,846 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 08:05:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267420482] [2020-12-22 08:05:22,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:22,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:05:22,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319736764] [2020-12-22 08:05:22,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:05:22,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:05:22,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:05:22,848 INFO L87 Difference]: Start difference. First operand 91304 states and 142371 transitions. Second operand 4 states. [2020-12-22 08:05:36,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:05:36,040 INFO L93 Difference]: Finished difference Result 267879 states and 417692 transitions. [2020-12-22 08:05:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:05:36,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 08:05:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:05:36,601 INFO L225 Difference]: With dead ends: 267879 [2020-12-22 08:05:36,601 INFO L226 Difference]: Without dead ends: 176631 [2020-12-22 08:05:36,689 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 08:05:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176631 states. [2020-12-22 08:05:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176631 to 176629. [2020-12-22 08:05:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176629 states. [2020-12-22 08:05:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176629 states to 176629 states and 273369 transitions. [2020-12-22 08:05:50,343 INFO L78 Accepts]: Start accepts. Automaton has 176629 states and 273369 transitions. Word has length 73 [2020-12-22 08:05:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:05:50,344 INFO L481 AbstractCegarLoop]: Abstraction has 176629 states and 273369 transitions. [2020-12-22 08:05:50,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:05:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 176629 states and 273369 transitions. [2020-12-22 08:05:50,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 08:05:50,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:05:50,349 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 08:05:50,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:05:50,350 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:05:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:05:50,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2004902810, now seen corresponding path program 1 times [2020-12-22 08:05:50,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:05:50,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321663773] [2020-12-22 08:05:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:05:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:05:50,386 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 08:05:50,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321663773] [2020-12-22 08:05:50,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:05:50,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:05:50,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925831558] [2020-12-22 08:05:50,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:05:50,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:05:50,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:05:50,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:05:50,389 INFO L87 Difference]: Start difference. First operand 176629 states and 273369 transitions. Second operand 3 states. [2020-12-22 08:06:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:06:16,325 INFO L93 Difference]: Finished difference Result 529735 states and 819874 transitions. [2020-12-22 08:06:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:06:16,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 08:06:16,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:06:17,321 INFO L225 Difference]: With dead ends: 529735 [2020-12-22 08:06:17,322 INFO L226 Difference]: Without dead ends: 353197 [2020-12-22 08:06:17,541 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 08:06:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353197 states. [2020-12-22 08:06:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353197 to 176639. [2020-12-22 08:06:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176639 states. [2020-12-22 08:06:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176639 states to 176639 states and 273379 transitions. [2020-12-22 08:06:34,132 INFO L78 Accepts]: Start accepts. Automaton has 176639 states and 273379 transitions. Word has length 74 [2020-12-22 08:06:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:06:34,132 INFO L481 AbstractCegarLoop]: Abstraction has 176639 states and 273379 transitions. [2020-12-22 08:06:34,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:06:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 176639 states and 273379 transitions. [2020-12-22 08:06:34,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 08:06:34,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:06:34,135 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 08:06:34,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:06:34,135 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:06:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:06:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1175997191, now seen corresponding path program 1 times [2020-12-22 08:06:34,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:06:34,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728588601] [2020-12-22 08:06:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:06:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:06:34,218 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 08:06:34,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728588601] [2020-12-22 08:06:34,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:06:34,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:06:34,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600414576] [2020-12-22 08:06:34,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:06:34,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:06:34,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:06:34,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:06:34,221 INFO L87 Difference]: Start difference. First operand 176639 states and 273379 transitions. Second operand 4 states. [2020-12-22 08:07:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:07:03,867 INFO L93 Difference]: Finished difference Result 517835 states and 801320 transitions. [2020-12-22 08:07:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:07:03,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 08:07:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:07:04,885 INFO L225 Difference]: With dead ends: 517835 [2020-12-22 08:07:04,886 INFO L226 Difference]: Without dead ends: 341297 [2020-12-22 08:07:05,121 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 08:07:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341297 states.