/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:11:59,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:11:59,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:11:59,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 08:11:59,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:11:59,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:11:59,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:11:59,940 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:11:59,969 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:11:59,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:11:59,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:11:59,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:11:59,971 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:11:59,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:11:59,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:11:59,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:11:59,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:11:59,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:11:59,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:11:59,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:11:59,973 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:11:59,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:11:59,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:11:59,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:11:59,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:11:59,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:11:59,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:11:59,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:11:59,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:11:59,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:11:59,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:11:59,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:11:59,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:11:59,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:12:00,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:12:00,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:12:00,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:12:00,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:12:00,363 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:12:00,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:12:00,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eeb4bdca/60839853c47f436a8a030475de4b38d7/FLAGe891e85d6 [2020-12-22 08:12:01,260 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:12:01,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:12:01,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eeb4bdca/60839853c47f436a8a030475de4b38d7/FLAGe891e85d6 [2020-12-22 08:12:01,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eeb4bdca/60839853c47f436a8a030475de4b38d7 [2020-12-22 08:12:01,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:12:01,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:12:01,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:12:01,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:12:01,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:12:01,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:12:01" (1/1) ... [2020-12-22 08:12:01,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67002f03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:01, skipping insertion in model container [2020-12-22 08:12:01,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:12:01" (1/1) ... [2020-12-22 08:12:01,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:12:01,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:12:01,701 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12580,12593] [2020-12-22 08:12:01,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:12:01,836 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:12:01,949 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12580,12593] [2020-12-22 08:12:02,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:12:02,091 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:12:02,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02 WrapperNode [2020-12-22 08:12:02,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:12:02,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:12:02,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:12:02,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:12:02,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... [2020-12-22 08:12:02,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... [2020-12-22 08:12:02,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:12:02,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:12:02,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:12:02,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:12:02,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... [2020-12-22 08:12:02,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... [2020-12-22 08:12:02,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... [2020-12-22 08:12:02,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... [2020-12-22 08:12:02,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... [2020-12-22 08:12:02,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... [2020-12-22 08:12:02,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... [2020-12-22 08:12:02,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:12:02,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:12:02,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:12:02,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:12:02,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:12:02,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:12:02,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:12:02,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:12:02,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:12:03,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:12:03,771 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:12:03,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:12:03 BoogieIcfgContainer [2020-12-22 08:12:03,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:12:03,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:12:03,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:12:03,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:12:03,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:12:01" (1/3) ... [2020-12-22 08:12:03,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673e3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:12:03, skipping insertion in model container [2020-12-22 08:12:03,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:12:02" (2/3) ... [2020-12-22 08:12:03,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673e3ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:12:03, skipping insertion in model container [2020-12-22 08:12:03,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:12:03" (3/3) ... [2020-12-22 08:12:03,784 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:12:03,791 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:12:03,797 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:12:03,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:12:03,853 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:12:03,853 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:12:03,853 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:12:03,853 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:12:03,853 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:12:03,854 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:12:03,854 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:12:03,854 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:12:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states. [2020-12-22 08:12:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 08:12:03,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:03,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:03,899 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:03,905 INFO L82 PathProgramCache]: Analyzing trace with hash 430105228, now seen corresponding path program 1 times [2020-12-22 08:12:03,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:03,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180995793] [2020-12-22 08:12:03,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:04,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180995793] [2020-12-22 08:12:04,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:04,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:12:04,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20830270] [2020-12-22 08:12:04,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:12:04,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:04,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:12:04,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:04,521 INFO L87 Difference]: Start difference. First operand 326 states. Second operand 3 states. [2020-12-22 08:12:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:04,704 INFO L93 Difference]: Finished difference Result 589 states and 1021 transitions. [2020-12-22 08:12:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:12:04,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 08:12:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:04,727 INFO L225 Difference]: With dead ends: 589 [2020-12-22 08:12:04,728 INFO L226 Difference]: Without dead ends: 446 [2020-12-22 08:12:04,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-22 08:12:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2020-12-22 08:12:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-22 08:12:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 734 transitions. [2020-12-22 08:12:04,830 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 734 transitions. Word has length 110 [2020-12-22 08:12:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:04,831 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 734 transitions. [2020-12-22 08:12:04,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:12:04,831 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 734 transitions. [2020-12-22 08:12:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 08:12:04,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:04,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:04,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:12:04,838 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1228540371, now seen corresponding path program 1 times [2020-12-22 08:12:04,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:04,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161995121] [2020-12-22 08:12:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:05,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161995121] [2020-12-22 08:12:05,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:05,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:12:05,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922110533] [2020-12-22 08:12:05,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:12:05,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:05,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:12:05,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:05,181 INFO L87 Difference]: Start difference. First operand 443 states and 734 transitions. Second operand 3 states. [2020-12-22 08:12:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:05,285 INFO L93 Difference]: Finished difference Result 933 states and 1550 transitions. [2020-12-22 08:12:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:12:05,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 08:12:05,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:05,292 INFO L225 Difference]: With dead ends: 933 [2020-12-22 08:12:05,292 INFO L226 Difference]: Without dead ends: 679 [2020-12-22 08:12:05,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-12-22 08:12:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 675. [2020-12-22 08:12:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2020-12-22 08:12:05,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1118 transitions. [2020-12-22 08:12:05,365 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1118 transitions. Word has length 113 [2020-12-22 08:12:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:05,366 INFO L481 AbstractCegarLoop]: Abstraction has 675 states and 1118 transitions. [2020-12-22 08:12:05,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:12:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1118 transitions. [2020-12-22 08:12:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 08:12:05,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:05,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:05,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:12:05,374 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:05,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1403707664, now seen corresponding path program 1 times [2020-12-22 08:12:05,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:05,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511032880] [2020-12-22 08:12:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:05,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511032880] [2020-12-22 08:12:05,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:05,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:12:05,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592260927] [2020-12-22 08:12:05,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:12:05,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:05,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:12:05,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:05,663 INFO L87 Difference]: Start difference. First operand 675 states and 1118 transitions. Second operand 3 states. [2020-12-22 08:12:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:05,738 INFO L93 Difference]: Finished difference Result 1611 states and 2668 transitions. [2020-12-22 08:12:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:12:05,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 08:12:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:05,747 INFO L225 Difference]: With dead ends: 1611 [2020-12-22 08:12:05,747 INFO L226 Difference]: Without dead ends: 1125 [2020-12-22 08:12:05,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2020-12-22 08:12:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1119. [2020-12-22 08:12:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2020-12-22 08:12:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1846 transitions. [2020-12-22 08:12:05,817 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1846 transitions. Word has length 116 [2020-12-22 08:12:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:05,825 INFO L481 AbstractCegarLoop]: Abstraction has 1119 states and 1846 transitions. [2020-12-22 08:12:05,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:12:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1846 transitions. [2020-12-22 08:12:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 08:12:05,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:05,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:05,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:12:05,831 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:05,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1658128561, now seen corresponding path program 1 times [2020-12-22 08:12:05,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:05,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113056536] [2020-12-22 08:12:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:06,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113056536] [2020-12-22 08:12:06,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:06,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:12:06,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137714841] [2020-12-22 08:12:06,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:12:06,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:06,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:12:06,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:06,055 INFO L87 Difference]: Start difference. First operand 1119 states and 1846 transitions. Second operand 3 states. [2020-12-22 08:12:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:06,207 INFO L93 Difference]: Finished difference Result 2907 states and 4784 transitions. [2020-12-22 08:12:06,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:12:06,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2020-12-22 08:12:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:06,221 INFO L225 Difference]: With dead ends: 2907 [2020-12-22 08:12:06,222 INFO L226 Difference]: Without dead ends: 1977 [2020-12-22 08:12:06,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2020-12-22 08:12:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1967. [2020-12-22 08:12:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1967 states. [2020-12-22 08:12:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3222 transitions. [2020-12-22 08:12:06,358 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3222 transitions. Word has length 119 [2020-12-22 08:12:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:06,358 INFO L481 AbstractCegarLoop]: Abstraction has 1967 states and 3222 transitions. [2020-12-22 08:12:06,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:12:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3222 transitions. [2020-12-22 08:12:06,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 08:12:06,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:06,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:06,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:12:06,364 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:06,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1735235476, now seen corresponding path program 1 times [2020-12-22 08:12:06,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:06,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121751464] [2020-12-22 08:12:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:06,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121751464] [2020-12-22 08:12:06,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:06,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:12:06,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423717159] [2020-12-22 08:12:06,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:12:06,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:06,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:12:06,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:12:06,581 INFO L87 Difference]: Start difference. First operand 1967 states and 3222 transitions. Second operand 6 states. [2020-12-22 08:12:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:07,340 INFO L93 Difference]: Finished difference Result 8371 states and 13812 transitions. [2020-12-22 08:12:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:12:07,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-12-22 08:12:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:07,381 INFO L225 Difference]: With dead ends: 8371 [2020-12-22 08:12:07,381 INFO L226 Difference]: Without dead ends: 6593 [2020-12-22 08:12:07,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:12:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2020-12-22 08:12:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 4691. [2020-12-22 08:12:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4691 states. [2020-12-22 08:12:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7712 transitions. [2020-12-22 08:12:07,823 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7712 transitions. Word has length 122 [2020-12-22 08:12:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:07,823 INFO L481 AbstractCegarLoop]: Abstraction has 4691 states and 7712 transitions. [2020-12-22 08:12:07,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:12:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7712 transitions. [2020-12-22 08:12:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 08:12:07,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:07,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:07,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:12:07,829 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:07,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2109337106, now seen corresponding path program 1 times [2020-12-22 08:12:07,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:07,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379617250] [2020-12-22 08:12:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:07,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379617250] [2020-12-22 08:12:07,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:07,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:12:07,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131769696] [2020-12-22 08:12:07,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:12:07,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:07,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:12:07,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:12:07,974 INFO L87 Difference]: Start difference. First operand 4691 states and 7712 transitions. Second operand 4 states. [2020-12-22 08:12:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:08,559 INFO L93 Difference]: Finished difference Result 11831 states and 19533 transitions. [2020-12-22 08:12:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:12:08,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-12-22 08:12:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:08,603 INFO L225 Difference]: With dead ends: 11831 [2020-12-22 08:12:08,603 INFO L226 Difference]: Without dead ends: 7329 [2020-12-22 08:12:08,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:12:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7329 states. [2020-12-22 08:12:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7329 to 6819. [2020-12-22 08:12:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6819 states. [2020-12-22 08:12:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6819 states to 6819 states and 11232 transitions. [2020-12-22 08:12:09,136 INFO L78 Accepts]: Start accepts. Automaton has 6819 states and 11232 transitions. Word has length 123 [2020-12-22 08:12:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:09,136 INFO L481 AbstractCegarLoop]: Abstraction has 6819 states and 11232 transitions. [2020-12-22 08:12:09,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:12:09,136 INFO L276 IsEmpty]: Start isEmpty. Operand 6819 states and 11232 transitions. [2020-12-22 08:12:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 08:12:09,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:09,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:09,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:12:09,142 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1027444837, now seen corresponding path program 1 times [2020-12-22 08:12:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:09,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908385310] [2020-12-22 08:12:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:09,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908385310] [2020-12-22 08:12:09,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:09,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:12:09,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601828184] [2020-12-22 08:12:09,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:12:09,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:09,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:12:09,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:12:09,272 INFO L87 Difference]: Start difference. First operand 6819 states and 11232 transitions. Second operand 4 states. [2020-12-22 08:12:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:10,122 INFO L93 Difference]: Finished difference Result 17842 states and 29452 transitions. [2020-12-22 08:12:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:12:10,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-12-22 08:12:10,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:10,191 INFO L225 Difference]: With dead ends: 17842 [2020-12-22 08:12:10,191 INFO L226 Difference]: Without dead ends: 11212 [2020-12-22 08:12:10,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:12:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11212 states. [2020-12-22 08:12:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11212 to 9771. [2020-12-22 08:12:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9771 states. [2020-12-22 08:12:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9771 states to 9771 states and 16083 transitions. [2020-12-22 08:12:10,990 INFO L78 Accepts]: Start accepts. Automaton has 9771 states and 16083 transitions. Word has length 124 [2020-12-22 08:12:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:10,991 INFO L481 AbstractCegarLoop]: Abstraction has 9771 states and 16083 transitions. [2020-12-22 08:12:10,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:12:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 9771 states and 16083 transitions. [2020-12-22 08:12:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:12:10,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:10,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:10,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:12:10,998 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:10,999 INFO L82 PathProgramCache]: Analyzing trace with hash -275676370, now seen corresponding path program 1 times [2020-12-22 08:12:10,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:10,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450451385] [2020-12-22 08:12:11,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:11,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450451385] [2020-12-22 08:12:11,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:11,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:12:11,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280304036] [2020-12-22 08:12:11,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:12:11,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:11,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:12:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:11,107 INFO L87 Difference]: Start difference. First operand 9771 states and 16083 transitions. Second operand 3 states. [2020-12-22 08:12:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:11,972 INFO L93 Difference]: Finished difference Result 19632 states and 32392 transitions. [2020-12-22 08:12:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:12:11,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:12:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:12,004 INFO L225 Difference]: With dead ends: 19632 [2020-12-22 08:12:12,004 INFO L226 Difference]: Without dead ends: 14134 [2020-12-22 08:12:12,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14134 states. [2020-12-22 08:12:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14134 to 14132. [2020-12-22 08:12:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14132 states. [2020-12-22 08:12:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14132 states to 14132 states and 23224 transitions. [2020-12-22 08:12:13,114 INFO L78 Accepts]: Start accepts. Automaton has 14132 states and 23224 transitions. Word has length 125 [2020-12-22 08:12:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:13,115 INFO L481 AbstractCegarLoop]: Abstraction has 14132 states and 23224 transitions. [2020-12-22 08:12:13,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:12:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 14132 states and 23224 transitions. [2020-12-22 08:12:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:12:13,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:13,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:13,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:12:13,120 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 15369622, now seen corresponding path program 1 times [2020-12-22 08:12:13,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:13,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140944032] [2020-12-22 08:12:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:13,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140944032] [2020-12-22 08:12:13,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:13,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:12:13,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264517111] [2020-12-22 08:12:13,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:12:13,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:13,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:12:13,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:13,310 INFO L87 Difference]: Start difference. First operand 14132 states and 23224 transitions. Second operand 3 states. [2020-12-22 08:12:14,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:14,418 INFO L93 Difference]: Finished difference Result 27858 states and 45917 transitions. [2020-12-22 08:12:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:12:14,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:12:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:14,463 INFO L225 Difference]: With dead ends: 27858 [2020-12-22 08:12:14,464 INFO L226 Difference]: Without dead ends: 20148 [2020-12-22 08:12:14,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20148 states. [2020-12-22 08:12:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20148 to 20146. [2020-12-22 08:12:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20146 states. [2020-12-22 08:12:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20146 states to 20146 states and 33054 transitions. [2020-12-22 08:12:15,592 INFO L78 Accepts]: Start accepts. Automaton has 20146 states and 33054 transitions. Word has length 125 [2020-12-22 08:12:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:15,593 INFO L481 AbstractCegarLoop]: Abstraction has 20146 states and 33054 transitions. [2020-12-22 08:12:15,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:12:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 20146 states and 33054 transitions. [2020-12-22 08:12:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:12:15,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:15,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:15,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:12:15,597 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:15,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1843964843, now seen corresponding path program 1 times [2020-12-22 08:12:15,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:15,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598350366] [2020-12-22 08:12:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:15,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598350366] [2020-12-22 08:12:15,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:15,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:12:15,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813896144] [2020-12-22 08:12:15,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:12:15,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:12:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:12:15,692 INFO L87 Difference]: Start difference. First operand 20146 states and 33054 transitions. Second operand 4 states. [2020-12-22 08:12:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:17,872 INFO L93 Difference]: Finished difference Result 63048 states and 103778 transitions. [2020-12-22 08:12:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:12:17,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 08:12:17,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:17,968 INFO L225 Difference]: With dead ends: 63048 [2020-12-22 08:12:17,969 INFO L226 Difference]: Without dead ends: 43510 [2020-12-22 08:12:17,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:12:18,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43510 states. [2020-12-22 08:12:19,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43510 to 31766. [2020-12-22 08:12:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31766 states. [2020-12-22 08:12:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31766 states to 31766 states and 52060 transitions. [2020-12-22 08:12:19,549 INFO L78 Accepts]: Start accepts. Automaton has 31766 states and 52060 transitions. Word has length 125 [2020-12-22 08:12:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:19,549 INFO L481 AbstractCegarLoop]: Abstraction has 31766 states and 52060 transitions. [2020-12-22 08:12:19,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:12:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 31766 states and 52060 transitions. [2020-12-22 08:12:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:12:19,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:19,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:19,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:12:19,553 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:19,554 INFO L82 PathProgramCache]: Analyzing trace with hash -815921210, now seen corresponding path program 1 times [2020-12-22 08:12:19,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:19,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028013552] [2020-12-22 08:12:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:19,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028013552] [2020-12-22 08:12:19,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:19,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:12:19,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985125043] [2020-12-22 08:12:19,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:12:19,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:19,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:12:19,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:19,635 INFO L87 Difference]: Start difference. First operand 31766 states and 52060 transitions. Second operand 3 states. [2020-12-22 08:12:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:21,807 INFO L93 Difference]: Finished difference Result 70396 states and 115732 transitions. [2020-12-22 08:12:21,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:12:21,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:12:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:21,890 INFO L225 Difference]: With dead ends: 70396 [2020-12-22 08:12:21,891 INFO L226 Difference]: Without dead ends: 47781 [2020-12-22 08:12:21,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47781 states. [2020-12-22 08:12:24,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47781 to 47779. [2020-12-22 08:12:24,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47779 states. [2020-12-22 08:12:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47779 states to 47779 states and 78186 transitions. [2020-12-22 08:12:24,266 INFO L78 Accepts]: Start accepts. Automaton has 47779 states and 78186 transitions. Word has length 125 [2020-12-22 08:12:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:24,267 INFO L481 AbstractCegarLoop]: Abstraction has 47779 states and 78186 transitions. [2020-12-22 08:12:24,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:12:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 47779 states and 78186 transitions. [2020-12-22 08:12:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 08:12:24,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:24,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:24,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:12:24,269 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:24,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2056786782, now seen corresponding path program 1 times [2020-12-22 08:12:24,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:24,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807624234] [2020-12-22 08:12:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:24,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807624234] [2020-12-22 08:12:24,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:24,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:12:24,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870148896] [2020-12-22 08:12:24,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:12:24,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:12:24,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:24,351 INFO L87 Difference]: Start difference. First operand 47779 states and 78186 transitions. Second operand 3 states. [2020-12-22 08:12:27,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:27,749 INFO L93 Difference]: Finished difference Result 106298 states and 175363 transitions. [2020-12-22 08:12:27,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:12:27,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 08:12:27,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:27,932 INFO L225 Difference]: With dead ends: 106298 [2020-12-22 08:12:27,932 INFO L226 Difference]: Without dead ends: 71747 [2020-12-22 08:12:27,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:12:28,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71747 states. [2020-12-22 08:12:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71747 to 71745. [2020-12-22 08:12:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71745 states. [2020-12-22 08:12:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71745 states to 71745 states and 117564 transitions. [2020-12-22 08:12:31,677 INFO L78 Accepts]: Start accepts. Automaton has 71745 states and 117564 transitions. Word has length 125 [2020-12-22 08:12:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:31,678 INFO L481 AbstractCegarLoop]: Abstraction has 71745 states and 117564 transitions. [2020-12-22 08:12:31,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:12:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 71745 states and 117564 transitions. [2020-12-22 08:12:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 08:12:31,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:31,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:31,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:12:31,680 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:31,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1381723230, now seen corresponding path program 1 times [2020-12-22 08:12:31,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:31,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695154676] [2020-12-22 08:12:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:31,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695154676] [2020-12-22 08:12:31,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:31,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:12:31,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69269193] [2020-12-22 08:12:31,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:12:31,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:12:31,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:12:31,777 INFO L87 Difference]: Start difference. First operand 71745 states and 117564 transitions. Second operand 4 states. [2020-12-22 08:12:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:39,139 INFO L93 Difference]: Finished difference Result 221822 states and 364275 transitions. [2020-12-22 08:12:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:12:39,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-12-22 08:12:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:39,579 INFO L225 Difference]: With dead ends: 221822 [2020-12-22 08:12:39,580 INFO L226 Difference]: Without dead ends: 150321 [2020-12-22 08:12:39,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:12:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150321 states. [2020-12-22 08:12:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150321 to 110776. [2020-12-22 08:12:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110776 states. [2020-12-22 08:12:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110776 states to 110776 states and 181057 transitions. [2020-12-22 08:12:45,733 INFO L78 Accepts]: Start accepts. Automaton has 110776 states and 181057 transitions. Word has length 126 [2020-12-22 08:12:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:12:45,733 INFO L481 AbstractCegarLoop]: Abstraction has 110776 states and 181057 transitions. [2020-12-22 08:12:45,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:12:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 110776 states and 181057 transitions. [2020-12-22 08:12:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 08:12:45,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:12:45,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:12:45,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:12:45,736 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:12:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:12:45,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2086532755, now seen corresponding path program 1 times [2020-12-22 08:12:45,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:12:45,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234882071] [2020-12-22 08:12:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:12:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:12:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:12:46,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234882071] [2020-12-22 08:12:46,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:12:46,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:12:46,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399120569] [2020-12-22 08:12:46,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:12:46,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:12:46,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:12:46,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:12:46,018 INFO L87 Difference]: Start difference. First operand 110776 states and 181057 transitions. Second operand 6 states. [2020-12-22 08:12:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:12:55,607 INFO L93 Difference]: Finished difference Result 279054 states and 456463 transitions. [2020-12-22 08:12:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:12:55,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-12-22 08:12:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:12:55,915 INFO L225 Difference]: With dead ends: 279054 [2020-12-22 08:12:55,915 INFO L226 Difference]: Without dead ends: 168522 [2020-12-22 08:12:56,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:12:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168522 states. [2020-12-22 08:13:04,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168522 to 141796. [2020-12-22 08:13:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141796 states. [2020-12-22 08:13:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141796 states to 141796 states and 230812 transitions. [2020-12-22 08:13:04,554 INFO L78 Accepts]: Start accepts. Automaton has 141796 states and 230812 transitions. Word has length 128 [2020-12-22 08:13:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:04,555 INFO L481 AbstractCegarLoop]: Abstraction has 141796 states and 230812 transitions. [2020-12-22 08:13:04,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:13:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 141796 states and 230812 transitions. [2020-12-22 08:13:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 08:13:04,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:04,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:13:04,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:13:04,556 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:04,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1082243879, now seen corresponding path program 1 times [2020-12-22 08:13:04,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:04,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196671635] [2020-12-22 08:13:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:05,143 WARN L197 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-12-22 08:13:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:05,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196671635] [2020-12-22 08:13:05,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:05,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:13:05,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358453121] [2020-12-22 08:13:05,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:13:05,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:05,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:13:05,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:13:05,224 INFO L87 Difference]: Start difference. First operand 141796 states and 230812 transitions. Second operand 6 states. [2020-12-22 08:13:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:13:26,109 INFO L93 Difference]: Finished difference Result 463500 states and 755841 transitions. [2020-12-22 08:13:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:13:26,111 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2020-12-22 08:13:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:13:26,964 INFO L225 Difference]: With dead ends: 463500 [2020-12-22 08:13:26,964 INFO L226 Difference]: Without dead ends: 321948 [2020-12-22 08:13:27,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:13:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321948 states. [2020-12-22 08:13:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321948 to 195472. [2020-12-22 08:13:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195472 states. [2020-12-22 08:13:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195472 states to 195472 states and 317363 transitions. [2020-12-22 08:13:43,087 INFO L78 Accepts]: Start accepts. Automaton has 195472 states and 317363 transitions. Word has length 131 [2020-12-22 08:13:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:13:43,087 INFO L481 AbstractCegarLoop]: Abstraction has 195472 states and 317363 transitions. [2020-12-22 08:13:43,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:13:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 195472 states and 317363 transitions. [2020-12-22 08:13:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 08:13:43,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:13:43,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:13:43,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:13:43,100 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:13:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:13:43,106 INFO L82 PathProgramCache]: Analyzing trace with hash -812087216, now seen corresponding path program 1 times [2020-12-22 08:13:43,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:13:43,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706117559] [2020-12-22 08:13:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:13:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:13:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:13:43,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706117559] [2020-12-22 08:13:43,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:13:43,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:13:43,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900456507] [2020-12-22 08:13:43,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:13:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:13:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:13:43,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:13:43,329 INFO L87 Difference]: Start difference. First operand 195472 states and 317363 transitions. Second operand 5 states. [2020-12-22 08:14:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:11,992 INFO L93 Difference]: Finished difference Result 384896 states and 622435 transitions. [2020-12-22 08:14:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:14:11,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-12-22 08:14:11,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:12,974 INFO L225 Difference]: With dead ends: 384896 [2020-12-22 08:14:12,974 INFO L226 Difference]: Without dead ends: 384894 [2020-12-22 08:14:13,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:14:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384894 states. [2020-12-22 08:14:31,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384894 to 200188. [2020-12-22 08:14:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200188 states. [2020-12-22 08:14:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200188 states to 200188 states and 322052 transitions. [2020-12-22 08:14:31,914 INFO L78 Accepts]: Start accepts. Automaton has 200188 states and 322052 transitions. Word has length 132 [2020-12-22 08:14:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:14:31,914 INFO L481 AbstractCegarLoop]: Abstraction has 200188 states and 322052 transitions. [2020-12-22 08:14:31,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:14:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 200188 states and 322052 transitions. [2020-12-22 08:14:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:14:31,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:14:31,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:14:31,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:14:31,922 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:14:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:14:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1146801810, now seen corresponding path program 1 times [2020-12-22 08:14:31,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:14:31,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824673460] [2020-12-22 08:14:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:14:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:14:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 08:14:32,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824673460] [2020-12-22 08:14:32,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:14:32,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:14:32,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037143706] [2020-12-22 08:14:32,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:14:32,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:14:32,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:14:32,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:14:32,107 INFO L87 Difference]: Start difference. First operand 200188 states and 322052 transitions. Second operand 6 states. [2020-12-22 08:14:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:14:53,448 INFO L93 Difference]: Finished difference Result 310754 states and 502239 transitions. [2020-12-22 08:14:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:14:53,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 08:14:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:14:54,010 INFO L225 Difference]: With dead ends: 310754 [2020-12-22 08:14:54,011 INFO L226 Difference]: Without dead ends: 231712 [2020-12-22 08:14:54,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:14:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231712 states. [2020-12-22 08:15:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231712 to 215864. [2020-12-22 08:15:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215864 states. [2020-12-22 08:15:13,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215864 states to 215864 states and 347500 transitions. [2020-12-22 08:15:13,407 INFO L78 Accepts]: Start accepts. Automaton has 215864 states and 347500 transitions. Word has length 163 [2020-12-22 08:15:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:15:13,407 INFO L481 AbstractCegarLoop]: Abstraction has 215864 states and 347500 transitions. [2020-12-22 08:15:13,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:15:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 215864 states and 347500 transitions. [2020-12-22 08:15:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 08:15:13,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:15:13,432 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:15:13,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:15:13,433 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:15:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:15:13,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1437847802, now seen corresponding path program 1 times [2020-12-22 08:15:13,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:15:13,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901568557] [2020-12-22 08:15:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:15:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:15:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-22 08:15:13,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901568557] [2020-12-22 08:15:13,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:15:13,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:15:13,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49601173] [2020-12-22 08:15:13,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:15:13,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:15:13,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:15:13,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:15:13,628 INFO L87 Difference]: Start difference. First operand 215864 states and 347500 transitions. Second operand 6 states. [2020-12-22 08:15:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:15:34,890 INFO L93 Difference]: Finished difference Result 326430 states and 527687 transitions. [2020-12-22 08:15:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:15:34,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2020-12-22 08:15:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:15:35,507 INFO L225 Difference]: With dead ends: 326430 [2020-12-22 08:15:35,508 INFO L226 Difference]: Without dead ends: 247388 [2020-12-22 08:15:35,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:15:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247388 states.