/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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:44:23,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:44:23,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:44:23,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:44:23,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:44:23,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:44:23,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:44:23,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:44:23,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:44:23,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:44:23,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:44:23,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-22 09:44:24,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:44:24,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:44:24,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:44:24,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:44:24,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:44:24,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:44:24,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:44:24,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:44:24,070 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:44:24,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:44:24,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:44:24,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:44:24,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:44:24,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:44:24,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:44:24,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:44:24,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:44:24,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:44:24,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:44:24,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:44:24,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:44:24,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:44:24,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:44:24,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:44:24,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:44:24,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:44:24,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:44:24,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:44:24,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:44:24,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:44:24,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:44:24,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:44:24,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:44:24,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:44:24,548 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:44:24,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label00.c [2020-12-22 09:44:24,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/addcf8224/fa18b59a39864146bbaae2f579657068/FLAG60e482b0b [2020-12-22 09:44:25,705 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:44:25,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label00.c [2020-12-22 09:44:25,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/addcf8224/fa18b59a39864146bbaae2f579657068/FLAG60e482b0b [2020-12-22 09:44:26,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/addcf8224/fa18b59a39864146bbaae2f579657068 [2020-12-22 09:44:26,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:44:26,189 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:44:26,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:44:26,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:44:26,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:44:26,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:44:26" (1/1) ... [2020-12-22 09:44:26,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a04f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:26, skipping insertion in model container [2020-12-22 09:44:26,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:44:26" (1/1) ... [2020-12-22 09:44:26,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:44:26,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:44:26,881 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label00.c[8688,8701] [2020-12-22 09:44:26,910 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label00.c[10320,10333] [2020-12-22 09:44:28,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:44:28,099 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:44:28,173 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label00.c[8688,8701] [2020-12-22 09:44:28,179 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label00.c[10320,10333] [2020-12-22 09:44:28,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:44:28,947 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:44:28,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28 WrapperNode [2020-12-22 09:44:28,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:44:28,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:44:28,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:44:28,955 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:44:28,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:44:29,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:44:29,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:44:29,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:44:29,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:29,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:30,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (1/1) ... [2020-12-22 09:44:30,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:44:30,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:44:30,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:44:30,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:44:30,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (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 09:44:30,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:44:30,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:44:30,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:44:30,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:44:35,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:44:35,589 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:44:35,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:44:35 BoogieIcfgContainer [2020-12-22 09:44:35,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:44:35,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:44:35,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:44:35,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:44:35,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:44:26" (1/3) ... [2020-12-22 09:44:35,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbf071b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:44:35, skipping insertion in model container [2020-12-22 09:44:35,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:44:28" (2/3) ... [2020-12-22 09:44:35,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbf071b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:44:35, skipping insertion in model container [2020-12-22 09:44:35,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:44:35" (3/3) ... [2020-12-22 09:44:35,602 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label00.c [2020-12-22 09:44:35,609 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:44:35,615 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:44:35,634 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:44:35,677 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:44:35,677 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:44:35,677 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:44:35,677 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:44:35,677 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:44:35,678 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:44:35,678 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:44:35,678 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:44:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:44:35,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 09:44:35,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:35,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:35,719 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:35,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:35,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1153543979, now seen corresponding path program 1 times [2020-12-22 09:44:35,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:35,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211470675] [2020-12-22 09:44:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:36,068 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 09:44:36,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211470675] [2020-12-22 09:44:36,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:36,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:44:36,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877538743] [2020-12-22 09:44:36,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:36,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:36,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:36,094 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 3 states. [2020-12-22 09:44:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:42,273 INFO L93 Difference]: Finished difference Result 2512 states and 4834 transitions. [2020-12-22 09:44:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:42,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-22 09:44:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:42,314 INFO L225 Difference]: With dead ends: 2512 [2020-12-22 09:44:42,314 INFO L226 Difference]: Without dead ends: 1578 [2020-12-22 09:44:42,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-12-22 09:44:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2020-12-22 09:44:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:44:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2587 transitions. [2020-12-22 09:44:42,515 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2587 transitions. Word has length 16 [2020-12-22 09:44:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:42,516 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2587 transitions. [2020-12-22 09:44:42,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2587 transitions. [2020-12-22 09:44:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:44:42,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:42,521 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] [2020-12-22 09:44:42,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:44:42,522 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:42,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:42,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:44:42,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:42,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978931363] [2020-12-22 09:44:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:42,670 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 09:44:42,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978931363] [2020-12-22 09:44:42,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:42,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:42,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122482792] [2020-12-22 09:44:42,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:44:42,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:42,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:44:42,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:44:42,679 INFO L87 Difference]: Start difference. First operand 1578 states and 2587 transitions. Second operand 5 states. [2020-12-22 09:44:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:42,880 INFO L93 Difference]: Finished difference Result 1670 states and 2729 transitions. [2020-12-22 09:44:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:42,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:44:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:42,895 INFO L225 Difference]: With dead ends: 1670 [2020-12-22 09:44:42,895 INFO L226 Difference]: Without dead ends: 1622 [2020-12-22 09:44:42,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:44:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2020-12-22 09:44:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1578. [2020-12-22 09:44:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:44:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2564 transitions. [2020-12-22 09:44:42,975 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2564 transitions. Word has length 30 [2020-12-22 09:44:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:42,976 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2564 transitions. [2020-12-22 09:44:42,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:44:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2564 transitions. [2020-12-22 09:44:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:42,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:42,986 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] [2020-12-22 09:44:42,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:44:42,988 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:42,992 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:44:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:42,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729985016] [2020-12-22 09:44:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:43,141 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 09:44:43,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729985016] [2020-12-22 09:44:43,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:43,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:43,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184721780] [2020-12-22 09:44:43,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:43,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:43,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:43,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:43,153 INFO L87 Difference]: Start difference. First operand 1578 states and 2564 transitions. Second operand 3 states. [2020-12-22 09:44:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:43,208 INFO L93 Difference]: Finished difference Result 1660 states and 2692 transitions. [2020-12-22 09:44:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:43,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:43,220 INFO L225 Difference]: With dead ends: 1660 [2020-12-22 09:44:43,220 INFO L226 Difference]: Without dead ends: 1616 [2020-12-22 09:44:43,222 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 09:44:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-12-22 09:44:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2020-12-22 09:44:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1614 states. [2020-12-22 09:44:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2621 transitions. [2020-12-22 09:44:43,280 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2621 transitions. Word has length 52 [2020-12-22 09:44:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:43,280 INFO L481 AbstractCegarLoop]: Abstraction has 1614 states and 2621 transitions. [2020-12-22 09:44:43,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:43,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2621 transitions. [2020-12-22 09:44:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:43,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:43,288 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] [2020-12-22 09:44:43,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:44:43,289 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:43,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:44:43,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:43,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646909859] [2020-12-22 09:44:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:43,446 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 09:44:43,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646909859] [2020-12-22 09:44:43,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:43,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:43,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700017790] [2020-12-22 09:44:43,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:43,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:43,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:43,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:43,450 INFO L87 Difference]: Start difference. First operand 1614 states and 2621 transitions. Second operand 3 states. [2020-12-22 09:44:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:43,503 INFO L93 Difference]: Finished difference Result 1762 states and 2853 transitions. [2020-12-22 09:44:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:43,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:43,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:43,518 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 09:44:43,518 INFO L226 Difference]: Without dead ends: 1682 [2020-12-22 09:44:43,520 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 09:44:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2020-12-22 09:44:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2020-12-22 09:44:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-22 09:44:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2724 transitions. [2020-12-22 09:44:43,581 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2724 transitions. Word has length 52 [2020-12-22 09:44:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:43,581 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 2724 transitions. [2020-12-22 09:44:43,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:43,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2724 transitions. [2020-12-22 09:44:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:43,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:43,583 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] [2020-12-22 09:44:43,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:44:43,583 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:43,584 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:44:43,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:43,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624909555] [2020-12-22 09:44:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:43,728 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 09:44:43,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624909555] [2020-12-22 09:44:43,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:43,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600580150] [2020-12-22 09:44:43,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:43,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:43,733 INFO L87 Difference]: Start difference. First operand 1680 states and 2724 transitions. Second operand 3 states. [2020-12-22 09:44:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:43,804 INFO L93 Difference]: Finished difference Result 1948 states and 3142 transitions. [2020-12-22 09:44:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:43,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:43,818 INFO L225 Difference]: With dead ends: 1948 [2020-12-22 09:44:43,818 INFO L226 Difference]: Without dead ends: 1802 [2020-12-22 09:44:43,820 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 09:44:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-12-22 09:44:43,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-12-22 09:44:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-12-22 09:44:43,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2908 transitions. [2020-12-22 09:44:43,886 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2908 transitions. Word has length 52 [2020-12-22 09:44:43,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:43,887 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 2908 transitions. [2020-12-22 09:44:43,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:43,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2908 transitions. [2020-12-22 09:44:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:43,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:43,889 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] [2020-12-22 09:44:43,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:44:43,889 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:43,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:44:43,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:43,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309314786] [2020-12-22 09:44:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:43,986 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 09:44:43,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309314786] [2020-12-22 09:44:43,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:43,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:43,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682216966] [2020-12-22 09:44:43,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:43,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:43,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:43,989 INFO L87 Difference]: Start difference. First operand 1800 states and 2908 transitions. Second operand 3 states. [2020-12-22 09:44:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:44,053 INFO L93 Difference]: Finished difference Result 2284 states and 3654 transitions. [2020-12-22 09:44:44,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:44,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:44:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:44,069 INFO L225 Difference]: With dead ends: 2284 [2020-12-22 09:44:44,069 INFO L226 Difference]: Without dead ends: 2018 [2020-12-22 09:44:44,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-12-22 09:44:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2020-12-22 09:44:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2016 states. [2020-12-22 09:44:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3232 transitions. [2020-12-22 09:44:44,148 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3232 transitions. Word has length 52 [2020-12-22 09:44:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:44,150 INFO L481 AbstractCegarLoop]: Abstraction has 2016 states and 3232 transitions. [2020-12-22 09:44:44,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3232 transitions. [2020-12-22 09:44:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:44:44,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:44,153 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] [2020-12-22 09:44:44,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:44:44,153 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:44:44,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:44,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264550505] [2020-12-22 09:44:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:44,287 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 09:44:44,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264550505] [2020-12-22 09:44:44,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:44,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:44,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986762845] [2020-12-22 09:44:44,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:44,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:44,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:44,292 INFO L87 Difference]: Start difference. First operand 2016 states and 3232 transitions. Second operand 6 states. [2020-12-22 09:44:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:44,648 INFO L93 Difference]: Finished difference Result 5872 states and 9128 transitions. [2020-12-22 09:44:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:44:44,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:44:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:44,681 INFO L225 Difference]: With dead ends: 5872 [2020-12-22 09:44:44,681 INFO L226 Difference]: Without dead ends: 5390 [2020-12-22 09:44:44,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:44:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2020-12-22 09:44:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2020-12-22 09:44:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2496 states. [2020-12-22 09:44:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3936 transitions. [2020-12-22 09:44:44,852 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3936 transitions. Word has length 52 [2020-12-22 09:44:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:44,853 INFO L481 AbstractCegarLoop]: Abstraction has 2496 states and 3936 transitions. [2020-12-22 09:44:44,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3936 transitions. [2020-12-22 09:44:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:44:44,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:44,854 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] [2020-12-22 09:44:44,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:44:44,854 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:44,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:44,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:44:44,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:44,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385139788] [2020-12-22 09:44:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:44,945 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 09:44:44,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385139788] [2020-12-22 09:44:44,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:44,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:44:44,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429382737] [2020-12-22 09:44:44,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:44:44,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:44,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:44:44,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:44:44,949 INFO L87 Difference]: Start difference. First operand 2496 states and 3936 transitions. Second operand 3 states. [2020-12-22 09:44:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:45,077 INFO L93 Difference]: Finished difference Result 3902 states and 6036 transitions. [2020-12-22 09:44:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:44:45,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:44:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:45,096 INFO L225 Difference]: With dead ends: 3902 [2020-12-22 09:44:45,096 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:44:45,100 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 09:44:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:44:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:44:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:44:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4570 transitions. [2020-12-22 09:44:45,241 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4570 transitions. Word has length 54 [2020-12-22 09:44:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:45,243 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4570 transitions. [2020-12-22 09:44:45,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:44:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4570 transitions. [2020-12-22 09:44:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:44:45,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:45,244 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] [2020-12-22 09:44:45,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:44:45,244 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:44:45,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:45,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536193292] [2020-12-22 09:44:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:45,462 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 09:44:45,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536193292] [2020-12-22 09:44:45,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:45,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:45,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089346741] [2020-12-22 09:44:45,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:45,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:45,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:45,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:45,465 INFO L87 Difference]: Start difference. First operand 2938 states and 4570 transitions. Second operand 6 states. [2020-12-22 09:44:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:45,730 INFO L93 Difference]: Finished difference Result 4342 states and 6644 transitions. [2020-12-22 09:44:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:45,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:44:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:45,749 INFO L225 Difference]: With dead ends: 4342 [2020-12-22 09:44:45,749 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:44:45,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:44:45,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:44:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:44:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:44:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4546 transitions. [2020-12-22 09:44:45,962 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4546 transitions. Word has length 54 [2020-12-22 09:44:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:45,962 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4546 transitions. [2020-12-22 09:44:45,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4546 transitions. [2020-12-22 09:44:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:44:45,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:45,963 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] [2020-12-22 09:44:45,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:44:45,964 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:44:45,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:45,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864300765] [2020-12-22 09:44:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:46,063 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 09:44:46,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864300765] [2020-12-22 09:44:46,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:46,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:46,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42855306] [2020-12-22 09:44:46,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:46,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:46,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:46,070 INFO L87 Difference]: Start difference. First operand 2938 states and 4546 transitions. Second operand 6 states. [2020-12-22 09:44:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:46,303 INFO L93 Difference]: Finished difference Result 4340 states and 6595 transitions. [2020-12-22 09:44:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:46,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:44:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:46,334 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:44:46,334 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:44:46,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:44:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:44:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:44:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4522 transitions. [2020-12-22 09:44:46,484 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4522 transitions. Word has length 55 [2020-12-22 09:44:46,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:46,484 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4522 transitions. [2020-12-22 09:44:46,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:46,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4522 transitions. [2020-12-22 09:44:46,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:44:46,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:46,485 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] [2020-12-22 09:44:46,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:44:46,486 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:46,486 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:44:46,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:46,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230122599] [2020-12-22 09:44:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:46,565 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 09:44:46,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230122599] [2020-12-22 09:44:46,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:46,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:46,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132690952] [2020-12-22 09:44:46,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:46,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:46,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:46,569 INFO L87 Difference]: Start difference. First operand 2938 states and 4522 transitions. Second operand 6 states. [2020-12-22 09:44:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:46,801 INFO L93 Difference]: Finished difference Result 4340 states and 6547 transitions. [2020-12-22 09:44:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:46,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:44:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:46,810 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:44:46,810 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:44:46,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:44:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:44:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:44:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4498 transitions. [2020-12-22 09:44:46,966 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4498 transitions. Word has length 55 [2020-12-22 09:44:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:46,966 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4498 transitions. [2020-12-22 09:44:46,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4498 transitions. [2020-12-22 09:44:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:44:46,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:46,967 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] [2020-12-22 09:44:46,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:44:46,968 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:46,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:44:46,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:46,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313288756] [2020-12-22 09:44:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:47,060 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 09:44:47,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313288756] [2020-12-22 09:44:47,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:47,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:44:47,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075141537] [2020-12-22 09:44:47,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:44:47,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:44:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:44:47,062 INFO L87 Difference]: Start difference. First operand 2938 states and 4498 transitions. Second operand 5 states. [2020-12-22 09:44:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:47,389 INFO L93 Difference]: Finished difference Result 4169 states and 6196 transitions. [2020-12-22 09:44:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:44:47,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:44:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:47,400 INFO L225 Difference]: With dead ends: 4169 [2020-12-22 09:44:47,401 INFO L226 Difference]: Without dead ends: 4167 [2020-12-22 09:44:47,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:44:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2020-12-22 09:44:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2020-12-22 09:44:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:44:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4586 transitions. [2020-12-22 09:44:47,600 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4586 transitions. Word has length 55 [2020-12-22 09:44:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:47,600 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4586 transitions. [2020-12-22 09:44:47,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:44:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4586 transitions. [2020-12-22 09:44:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:44:47,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:47,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:47,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:44:47,611 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:44:47,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:47,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971064997] [2020-12-22 09:44:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:44:47,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971064997] [2020-12-22 09:44:47,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:47,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:47,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299420757] [2020-12-22 09:44:47,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:47,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:47,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:47,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:47,744 INFO L87 Difference]: Start difference. First operand 3034 states and 4586 transitions. Second operand 6 states. [2020-12-22 09:44:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:48,397 INFO L93 Difference]: Finished difference Result 9340 states and 13355 transitions. [2020-12-22 09:44:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:48,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:44:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:48,415 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:44:48,415 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:44:48,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:48,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:44:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:44:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:44:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6650 transitions. [2020-12-22 09:44:48,729 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6650 transitions. Word has length 79 [2020-12-22 09:44:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:48,729 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6650 transitions. [2020-12-22 09:44:48,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6650 transitions. [2020-12-22 09:44:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:44:48,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:48,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:48,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:44:48,734 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:44:48,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:48,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761060855] [2020-12-22 09:44:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:44:48,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761060855] [2020-12-22 09:44:48,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:48,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:48,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092296873] [2020-12-22 09:44:48,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:48,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:48,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:48,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:48,841 INFO L87 Difference]: Start difference. First operand 4530 states and 6650 transitions. Second operand 6 states. [2020-12-22 09:44:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:49,640 INFO L93 Difference]: Finished difference Result 10836 states and 15419 transitions. [2020-12-22 09:44:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:49,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:44:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:49,664 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:44:49,665 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:44:49,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:49,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:44:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:44:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:44:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9726 transitions. [2020-12-22 09:44:50,335 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9726 transitions. Word has length 79 [2020-12-22 09:44:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:50,336 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 9726 transitions. [2020-12-22 09:44:50,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9726 transitions. [2020-12-22 09:44:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:44:50,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:50,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:50,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:44:50,339 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:50,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:44:50,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:50,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289609420] [2020-12-22 09:44:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:44:50,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289609420] [2020-12-22 09:44:50,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:50,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:50,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742971688] [2020-12-22 09:44:50,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:50,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:50,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:50,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:50,438 INFO L87 Difference]: Start difference. First operand 6778 states and 9726 transitions. Second operand 6 states. [2020-12-22 09:44:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:51,493 INFO L93 Difference]: Finished difference Result 12332 states and 17483 transitions. [2020-12-22 09:44:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:51,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:44:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:51,519 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:44:51,519 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:44:51,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:44:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:44:52,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:44:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11790 transitions. [2020-12-22 09:44:52,177 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11790 transitions. Word has length 79 [2020-12-22 09:44:52,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:52,177 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 11790 transitions. [2020-12-22 09:44:52,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11790 transitions. [2020-12-22 09:44:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:44:52,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:52,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:52,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:44:52,181 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:52,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:44:52,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:52,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523914951] [2020-12-22 09:44:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:44:52,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523914951] [2020-12-22 09:44:52,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:44:52,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:44:52,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213305924] [2020-12-22 09:44:52,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:44:52,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:52,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:44:52,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:44:52,283 INFO L87 Difference]: Start difference. First operand 8274 states and 11790 transitions. Second operand 6 states. [2020-12-22 09:44:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:44:53,291 INFO L93 Difference]: Finished difference Result 12948 states and 18347 transitions. [2020-12-22 09:44:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:44:53,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:44:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:44:53,320 INFO L225 Difference]: With dead ends: 12948 [2020-12-22 09:44:53,320 INFO L226 Difference]: Without dead ends: 11890 [2020-12-22 09:44:53,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:44:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2020-12-22 09:44:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2020-12-22 09:44:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9330 states. [2020-12-22 09:44:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13262 transitions. [2020-12-22 09:44:53,928 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13262 transitions. Word has length 79 [2020-12-22 09:44:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:44:53,928 INFO L481 AbstractCegarLoop]: Abstraction has 9330 states and 13262 transitions. [2020-12-22 09:44:53,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:44:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13262 transitions. [2020-12-22 09:44:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:44:53,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:44:53,932 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:44:53,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:44:53,933 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:44:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:44:53,934 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:44:53,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:44:53,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31099119] [2020-12-22 09:44:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:44:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:54,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31099119] [2020-12-22 09:44:54,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814288817] [2020-12-22 09:44:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:44:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:44:54,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:44:54,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:44:54,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:44:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:44:55,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:44:55,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:44:55,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478862260] [2020-12-22 09:44:55,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:44:55,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:44:55,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:44:55,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:44:55,124 INFO L87 Difference]: Start difference. First operand 9330 states and 13262 transitions. Second operand 18 states. [2020-12-22 09:44:55,270 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:44:56,048 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:44:57,338 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:44:57,702 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:44:58,990 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:44:59,184 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:44:59,718 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:01,405 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:01,708 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:45:02,591 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 09:45:02,966 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:03,126 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:05,646 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:05,849 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:45:06,059 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:45:06,210 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:45:06,394 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:06,565 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:06,699 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:07,052 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:07,470 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:45:07,894 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:45:08,622 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:45:10,058 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:10,683 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:10,822 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:11,154 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:15,288 INFO L93 Difference]: Finished difference Result 85950 states and 117357 transitions. [2020-12-22 09:45:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:45:15,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:45:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:15,504 INFO L225 Difference]: With dead ends: 85950 [2020-12-22 09:45:15,504 INFO L226 Difference]: Without dead ends: 78156 [2020-12-22 09:45:15,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:45:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78156 states. [2020-12-22 09:45:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78156 to 35946. [2020-12-22 09:45:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35946 states. [2020-12-22 09:45:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35946 states to 35946 states and 49780 transitions. [2020-12-22 09:45:19,784 INFO L78 Accepts]: Start accepts. Automaton has 35946 states and 49780 transitions. Word has length 80 [2020-12-22 09:45:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:19,785 INFO L481 AbstractCegarLoop]: Abstraction has 35946 states and 49780 transitions. [2020-12-22 09:45:19,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:45:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 35946 states and 49780 transitions. [2020-12-22 09:45:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:19,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:19,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:19,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:45:19,996 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:19,997 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:45:19,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:19,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498237424] [2020-12-22 09:45:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:20,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498237424] [2020-12-22 09:45:20,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:20,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:20,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526982718] [2020-12-22 09:45:20,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:20,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:20,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:20,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:20,108 INFO L87 Difference]: Start difference. First operand 35946 states and 49780 transitions. Second operand 3 states. [2020-12-22 09:45:22,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:22,897 INFO L93 Difference]: Finished difference Result 70358 states and 97064 transitions. [2020-12-22 09:45:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:22,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:45:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:22,985 INFO L225 Difference]: With dead ends: 70358 [2020-12-22 09:45:22,985 INFO L226 Difference]: Without dead ends: 35948 [2020-12-22 09:45:23,033 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 09:45:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35948 states. [2020-12-22 09:45:26,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35948 to 34986. [2020-12-22 09:45:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34986 states. [2020-12-22 09:45:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34986 states to 34986 states and 47740 transitions. [2020-12-22 09:45:26,142 INFO L78 Accepts]: Start accepts. Automaton has 34986 states and 47740 transitions. Word has length 81 [2020-12-22 09:45:26,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:26,142 INFO L481 AbstractCegarLoop]: Abstraction has 34986 states and 47740 transitions. [2020-12-22 09:45:26,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 34986 states and 47740 transitions. [2020-12-22 09:45:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:45:26,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:26,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:26,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:45:26,147 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:26,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:26,148 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:45:26,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:26,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184354666] [2020-12-22 09:45:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:26,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184354666] [2020-12-22 09:45:26,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138147028] [2020-12-22 09:45:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:26,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:45:26,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:26,843 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:27,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:27,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-22 09:45:27,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863746032] [2020-12-22 09:45:27,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 09:45:27,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:27,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 09:45:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:45:27,271 INFO L87 Difference]: Start difference. First operand 34986 states and 47740 transitions. Second operand 19 states. [2020-12-22 09:45:27,451 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:45:27,588 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:45:27,761 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:45:27,945 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:45:28,117 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:28,664 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:28,818 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:29,046 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:30,132 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:34,655 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:34,820 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:35,155 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:45:35,317 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:35,723 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:36,399 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:36,677 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:45:37,029 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:37,396 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:37,928 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:45:38,322 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:38,512 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:39,011 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:45:40,367 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:40,664 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:41,246 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:45:41,603 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:45:47,107 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:45:47,683 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:45:47,858 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:48,483 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:48,785 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:45:49,372 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:49,634 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:49,813 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:45:58,826 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:45:59,600 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:03,419 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:04,019 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:08,993 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:14,195 INFO L93 Difference]: Finished difference Result 372069 states and 495010 transitions. [2020-12-22 09:46:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:46:14,196 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 09:46:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:14,867 INFO L225 Difference]: With dead ends: 372069 [2020-12-22 09:46:14,867 INFO L226 Difference]: Without dead ends: 338619 [2020-12-22 09:46:15,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=2822, Invalid=15538, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 09:46:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338619 states. [2020-12-22 09:46:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338619 to 166484. [2020-12-22 09:46:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166484 states. [2020-12-22 09:46:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166484 states to 166484 states and 223860 transitions. [2020-12-22 09:46:32,823 INFO L78 Accepts]: Start accepts. Automaton has 166484 states and 223860 transitions. Word has length 81 [2020-12-22 09:46:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:32,823 INFO L481 AbstractCegarLoop]: Abstraction has 166484 states and 223860 transitions. [2020-12-22 09:46:32,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 09:46:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 166484 states and 223860 transitions. [2020-12-22 09:46:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:32,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:32,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:33,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:33,064 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:46:33,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:33,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45256618] [2020-12-22 09:46:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:33,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45256618] [2020-12-22 09:46:33,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:33,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:33,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865598917] [2020-12-22 09:46:33,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:33,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:33,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:33,124 INFO L87 Difference]: Start difference. First operand 166484 states and 223860 transitions. Second operand 3 states. [2020-12-22 09:46:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:42,418 INFO L93 Difference]: Finished difference Result 258048 states and 346376 transitions. [2020-12-22 09:46:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:42,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:42,565 INFO L225 Difference]: With dead ends: 258048 [2020-12-22 09:46:42,565 INFO L226 Difference]: Without dead ends: 93100 [2020-12-22 09:46:42,648 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 09:46:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93100 states. [2020-12-22 09:46:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93100 to 93098. [2020-12-22 09:46:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93098 states. [2020-12-22 09:46:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93098 states to 93098 states and 123316 transitions. [2020-12-22 09:46:51,257 INFO L78 Accepts]: Start accepts. Automaton has 93098 states and 123316 transitions. Word has length 81 [2020-12-22 09:46:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:51,258 INFO L481 AbstractCegarLoop]: Abstraction has 93098 states and 123316 transitions. [2020-12-22 09:46:51,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 93098 states and 123316 transitions. [2020-12-22 09:46:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:51,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:51,263 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:51,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:46:51,263 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:51,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:46:51,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:51,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473568823] [2020-12-22 09:46:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:51,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473568823] [2020-12-22 09:46:51,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:51,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:51,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038789813] [2020-12-22 09:46:51,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:51,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:51,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:51,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:51,329 INFO L87 Difference]: Start difference. First operand 93098 states and 123316 transitions. Second operand 3 states. [2020-12-22 09:46:55,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:55,349 INFO L93 Difference]: Finished difference Result 135079 states and 179184 transitions. [2020-12-22 09:46:55,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:55,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:55,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:55,400 INFO L225 Difference]: With dead ends: 135079 [2020-12-22 09:46:55,400 INFO L226 Difference]: Without dead ends: 43517 [2020-12-22 09:46:55,437 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 09:46:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43517 states. [2020-12-22 09:46:59,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43517 to 43491. [2020-12-22 09:46:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43491 states. [2020-12-22 09:46:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43491 states to 43491 states and 57544 transitions. [2020-12-22 09:46:59,364 INFO L78 Accepts]: Start accepts. Automaton has 43491 states and 57544 transitions. Word has length 81 [2020-12-22 09:46:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:59,364 INFO L481 AbstractCegarLoop]: Abstraction has 43491 states and 57544 transitions. [2020-12-22 09:46:59,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 43491 states and 57544 transitions. [2020-12-22 09:46:59,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:59,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:59,369 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:59,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:46:59,369 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:59,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:59,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:46:59,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:59,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529121631] [2020-12-22 09:46:59,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:46:59,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529121631] [2020-12-22 09:46:59,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:59,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:46:59,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986225798] [2020-12-22 09:46:59,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:46:59,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:59,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:46:59,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:46:59,445 INFO L87 Difference]: Start difference. First operand 43491 states and 57544 transitions. Second operand 6 states. [2020-12-22 09:47:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:01,890 INFO L93 Difference]: Finished difference Result 66813 states and 88114 transitions. [2020-12-22 09:47:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:01,892 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:01,925 INFO L225 Difference]: With dead ends: 66813 [2020-12-22 09:47:01,925 INFO L226 Difference]: Without dead ends: 24895 [2020-12-22 09:47:02,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24895 states. [2020-12-22 09:47:04,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24895 to 24895. [2020-12-22 09:47:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24895 states. [2020-12-22 09:47:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24895 states to 24895 states and 32709 transitions. [2020-12-22 09:47:04,511 INFO L78 Accepts]: Start accepts. Automaton has 24895 states and 32709 transitions. Word has length 81 [2020-12-22 09:47:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:04,511 INFO L481 AbstractCegarLoop]: Abstraction has 24895 states and 32709 transitions. [2020-12-22 09:47:04,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 24895 states and 32709 transitions. [2020-12-22 09:47:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:04,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:04,514 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:04,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:47:04,514 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:04,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:04,515 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:47:04,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:04,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692092864] [2020-12-22 09:47:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:47:04,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692092864] [2020-12-22 09:47:04,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:04,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:04,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030727592] [2020-12-22 09:47:04,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:04,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:04,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:04,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:04,590 INFO L87 Difference]: Start difference. First operand 24895 states and 32709 transitions. Second operand 6 states. [2020-12-22 09:47:06,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:06,949 INFO L93 Difference]: Finished difference Result 43465 states and 56844 transitions. [2020-12-22 09:47:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:06,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:06,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:06,971 INFO L225 Difference]: With dead ends: 43465 [2020-12-22 09:47:06,972 INFO L226 Difference]: Without dead ends: 20125 [2020-12-22 09:47:06,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20125 states. [2020-12-22 09:47:08,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20125 to 20125. [2020-12-22 09:47:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20125 states. [2020-12-22 09:47:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20125 states to 20125 states and 26387 transitions. [2020-12-22 09:47:09,005 INFO L78 Accepts]: Start accepts. Automaton has 20125 states and 26387 transitions. Word has length 81 [2020-12-22 09:47:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:09,005 INFO L481 AbstractCegarLoop]: Abstraction has 20125 states and 26387 transitions. [2020-12-22 09:47:09,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:09,006 INFO L276 IsEmpty]: Start isEmpty. Operand 20125 states and 26387 transitions. [2020-12-22 09:47:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:47:09,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:09,008 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:09,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:47:09,008 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:09,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:47:09,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:09,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506491953] [2020-12-22 09:47:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:09,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506491953] [2020-12-22 09:47:09,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:09,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:09,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287973316] [2020-12-22 09:47:09,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:09,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:09,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:09,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:09,064 INFO L87 Difference]: Start difference. First operand 20125 states and 26387 transitions. Second operand 3 states. [2020-12-22 09:47:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:10,608 INFO L93 Difference]: Finished difference Result 29501 states and 38357 transitions. [2020-12-22 09:47:10,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:10,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:47:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:10,623 INFO L225 Difference]: With dead ends: 29501 [2020-12-22 09:47:10,623 INFO L226 Difference]: Without dead ends: 10931 [2020-12-22 09:47:10,634 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 09:47:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10931 states. [2020-12-22 09:47:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10931 to 10929. [2020-12-22 09:47:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10929 states. [2020-12-22 09:47:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10929 states to 10929 states and 14309 transitions. [2020-12-22 09:47:11,632 INFO L78 Accepts]: Start accepts. Automaton has 10929 states and 14309 transitions. Word has length 82 [2020-12-22 09:47:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:11,632 INFO L481 AbstractCegarLoop]: Abstraction has 10929 states and 14309 transitions. [2020-12-22 09:47:11,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 10929 states and 14309 transitions. [2020-12-22 09:47:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:47:11,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:11,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:11,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:47:11,634 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:47:11,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:11,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483487940] [2020-12-22 09:47:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:12,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483487940] [2020-12-22 09:47:12,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654379498] [2020-12-22 09:47:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:12,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 09:47:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:14,043 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:47:14,597 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:47:15,135 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:47:15,537 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 09:47:15,856 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:47:15,882 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:47:15,888 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:15,906 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:15,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:15,913 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:47:15,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:15,919 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:47:15,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:16,799 WARN L197 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-12-22 09:47:17,347 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:47:17,769 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-12-22 09:47:17,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:18,109 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:47:21,592 WARN L197 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 4197 DAG size of output: 3666 [2020-12-22 09:47:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:22,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:22,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 39 [2020-12-22 09:47:22,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772948997] [2020-12-22 09:47:22,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:47:22,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:22,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:47:22,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:47:22,165 INFO L87 Difference]: Start difference. First operand 10929 states and 14309 transitions. Second operand 39 states. [2020-12-22 09:47:23,805 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 09:47:24,007 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-22 09:47:24,262 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-12-22 09:47:24,599 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-22 09:47:25,142 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-12-22 09:47:25,515 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-12-22 09:47:25,899 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-12-22 09:47:26,314 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-12-22 09:47:26,806 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-12-22 09:47:27,324 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 09:47:27,807 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-12-22 09:47:28,329 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-12-22 09:47:28,832 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 09:47:29,504 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-12-22 09:47:30,200 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-12-22 09:47:31,605 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-12-22 09:47:32,275 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-12-22 09:47:33,512 WARN L197 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 139 DAG size of output: 108 [2020-12-22 09:47:34,459 WARN L197 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 09:47:35,137 WARN L197 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:47:35,646 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-22 09:47:35,918 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:47:36,472 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-22 09:47:36,923 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 09:47:37,331 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:47:37,667 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:47:39,178 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 09:47:39,404 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:47:39,825 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:47:41,039 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 09:47:41,669 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-22 09:47:42,139 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 09:47:42,544 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:47:46,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:46,607 INFO L93 Difference]: Finished difference Result 24470 states and 30938 transitions. [2020-12-22 09:47:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:47:46,609 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 09:47:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:46,627 INFO L225 Difference]: With dead ends: 24470 [2020-12-22 09:47:46,628 INFO L226 Difference]: Without dead ends: 21060 [2020-12-22 09:47:46,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=1679, Invalid=6511, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 09:47:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21060 states. [2020-12-22 09:47:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21060 to 10381. [2020-12-22 09:47:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10381 states. [2020-12-22 09:47:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10381 states to 10381 states and 13581 transitions. [2020-12-22 09:47:47,718 INFO L78 Accepts]: Start accepts. Automaton has 10381 states and 13581 transitions. Word has length 83 [2020-12-22 09:47:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:47,718 INFO L481 AbstractCegarLoop]: Abstraction has 10381 states and 13581 transitions. [2020-12-22 09:47:47,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:47:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 10381 states and 13581 transitions. [2020-12-22 09:47:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:47:47,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:47,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:47,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 09:47:47,936 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:47:47,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:47,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254436065] [2020-12-22 09:47:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:48,449 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:47:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:48,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254436065] [2020-12-22 09:47:48,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049452879] [2020-12-22 09:47:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:48,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 09:47:48,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:47:49,876 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:50,219 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-12-22 09:47:50,678 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:47:51,266 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 09:47:51,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:51,640 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:47:51,953 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:51,957 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:51,961 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:52,429 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:47:52,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:47:52,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:52,719 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:52,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:47:53,363 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-12-22 09:47:53,699 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 09:47:54,059 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:47:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:54,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:47:54,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2020-12-22 09:47:54,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64919648] [2020-12-22 09:47:54,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 09:47:54,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:54,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 09:47:54,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:47:54,162 INFO L87 Difference]: Start difference. First operand 10381 states and 13581 transitions. Second operand 37 states. [2020-12-22 09:47:55,506 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-12-22 09:47:55,755 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-12-22 09:47:56,055 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-12-22 09:47:56,346 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-12-22 09:47:56,678 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-22 09:47:57,107 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-12-22 09:47:57,608 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-12-22 09:47:58,105 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-12-22 09:47:58,660 WARN L197 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-12-22 09:47:59,173 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:47:59,696 WARN L197 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:48:00,268 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-12-22 09:48:01,013 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-12-22 09:48:01,669 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-12-22 09:48:02,151 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:48:02,650 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-12-22 09:48:02,988 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 09:48:03,744 WARN L197 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-12-22 09:48:04,149 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-12-22 09:48:04,935 WARN L197 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-22 09:48:05,715 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:48:06,156 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 09:48:06,535 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:48:06,978 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:48:07,275 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:48:07,668 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-12-22 09:48:08,128 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-22 09:48:08,642 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:48:08,949 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:48:09,498 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33