/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem19_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:00:07,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:00:07,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:00:07,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:00:07,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:00:07,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:00:07,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:00:07,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:00:07,820 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:00:07,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:00:07,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:00:07,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:00:07,823 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:00:07,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:00:07,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:00:07,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:00:07,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:00:07,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:00:07,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:00:07,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:00:07,824 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:00:07,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:00:07,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:00:07,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:00:07,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:00:07,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:00:07,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:00:07,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:00:07,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:00:07,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:00:07,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:00:07,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:00:07,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:00:07,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:00:08,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:00:08,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:00:08,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:00:08,216 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:00:08,217 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:00:08,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label32.c [2020-12-22 03:00:08,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0230e9555/3b1361bf0d4d47eaa95e23bc0090ddad/FLAGd7d198d39 [2020-12-22 03:00:09,638 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:00:09,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label32.c [2020-12-22 03:00:09,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0230e9555/3b1361bf0d4d47eaa95e23bc0090ddad/FLAGd7d198d39 [2020-12-22 03:00:09,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0230e9555/3b1361bf0d4d47eaa95e23bc0090ddad [2020-12-22 03:00:09,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:00:09,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:00:09,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:00:09,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:00:09,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:00:09,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:00:09" (1/1) ... [2020-12-22 03:00:09,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa8293d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:09, skipping insertion in model container [2020-12-22 03:00:09,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:00:09" (1/1) ... [2020-12-22 03:00:09,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:00:10,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:00:10,403 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label32.c[2877,2890] [2020-12-22 03:00:12,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:00:12,165 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:00:12,186 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label32.c[2877,2890] [2020-12-22 03:00:13,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:00:13,231 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:00:13,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13 WrapperNode [2020-12-22 03:00:13,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:00:13,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:00:13,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:00:13,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:00:13,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (1/1) ... [2020-12-22 03:00:13,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (1/1) ... [2020-12-22 03:00:14,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:00:14,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:00:14,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:00:14,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:00:14,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (1/1) ... [2020-12-22 03:00:14,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (1/1) ... [2020-12-22 03:00:14,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (1/1) ... [2020-12-22 03:00:14,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (1/1) ... [2020-12-22 03:00:15,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (1/1) ... [2020-12-22 03:00:15,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (1/1) ... [2020-12-22 03:00:15,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (1/1) ... [2020-12-22 03:00:15,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:00:15,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:00:15,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:00:15,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:00:15,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (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 03:00:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:00:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:00:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:00:15,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:00:26,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:00:26,322 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 03:00:26,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:00:26 BoogieIcfgContainer [2020-12-22 03:00:26,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:00:26,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:00:26,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:00:26,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:00:26,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:00:09" (1/3) ... [2020-12-22 03:00:26,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6dad5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:00:26, skipping insertion in model container [2020-12-22 03:00:26,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:00:13" (2/3) ... [2020-12-22 03:00:26,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6dad5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:00:26, skipping insertion in model container [2020-12-22 03:00:26,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:00:26" (3/3) ... [2020-12-22 03:00:26,335 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label32.c [2020-12-22 03:00:26,342 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:00:26,348 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:00:26,367 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:00:26,407 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:00:26,408 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:00:26,408 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:00:26,408 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:00:26,408 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:00:26,408 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:00:26,408 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:00:26,409 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:00:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states. [2020-12-22 03:00:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:00:26,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:00:26,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:00:26,462 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:00:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:00:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 406614337, now seen corresponding path program 1 times [2020-12-22 03:00:26,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:00:26,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798256766] [2020-12-22 03:00:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:00:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:00:26,733 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 03:00:26,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798256766] [2020-12-22 03:00:26,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:00:26,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:00:26,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431661204] [2020-12-22 03:00:26,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:00:26,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:00:26,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:00:26,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:00:26,763 INFO L87 Difference]: Start difference. First operand 1748 states. Second operand 3 states. [2020-12-22 03:00:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:00:39,174 INFO L93 Difference]: Finished difference Result 4919 states and 9313 transitions. [2020-12-22 03:00:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:00:39,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 03:00:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:00:39,224 INFO L225 Difference]: With dead ends: 4919 [2020-12-22 03:00:39,224 INFO L226 Difference]: Without dead ends: 3107 [2020-12-22 03:00:39,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:00:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-12-22 03:00:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3106. [2020-12-22 03:00:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3106 states. [2020-12-22 03:00:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 5132 transitions. [2020-12-22 03:00:39,434 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 5132 transitions. Word has length 19 [2020-12-22 03:00:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:00:39,434 INFO L481 AbstractCegarLoop]: Abstraction has 3106 states and 5132 transitions. [2020-12-22 03:00:39,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:00:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 5132 transitions. [2020-12-22 03:00:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 03:00:39,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:00:39,441 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 03:00:39,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:00:39,443 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:00:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:00:39,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1607759274, now seen corresponding path program 1 times [2020-12-22 03:00:39,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:00:39,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537184816] [2020-12-22 03:00:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:00:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:00:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:00:39,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537184816] [2020-12-22 03:00:39,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:00:39,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:00:39,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509732235] [2020-12-22 03:00:39,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:00:39,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:00:39,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:00:39,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:00:39,768 INFO L87 Difference]: Start difference. First operand 3106 states and 5132 transitions. Second operand 4 states. [2020-12-22 03:01:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:01:05,019 INFO L93 Difference]: Finished difference Result 10391 states and 16943 transitions. [2020-12-22 03:01:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:01:05,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2020-12-22 03:01:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:01:05,061 INFO L225 Difference]: With dead ends: 10391 [2020-12-22 03:01:05,061 INFO L226 Difference]: Without dead ends: 7287 [2020-12-22 03:01:05,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 03:01:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2020-12-22 03:01:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 7236. [2020-12-22 03:01:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7236 states. [2020-12-22 03:01:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 11008 transitions. [2020-12-22 03:01:05,219 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 11008 transitions. Word has length 88 [2020-12-22 03:01:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:01:05,219 INFO L481 AbstractCegarLoop]: Abstraction has 7236 states and 11008 transitions. [2020-12-22 03:01:05,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:01:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 11008 transitions. [2020-12-22 03:01:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-22 03:01:05,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:01:05,228 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:01:05,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:01:05,228 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:01:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:01:05,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1806585751, now seen corresponding path program 1 times [2020-12-22 03:01:05,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:01:05,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831928101] [2020-12-22 03:01:05,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:01:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:01:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:01:05,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831928101] [2020-12-22 03:01:05,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:01:05,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:01:05,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501009847] [2020-12-22 03:01:05,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:01:05,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:01:05,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:01:05,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:01:05,566 INFO L87 Difference]: Start difference. First operand 7236 states and 11008 transitions. Second operand 3 states. [2020-12-22 03:01:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:01:19,482 INFO L93 Difference]: Finished difference Result 15858 states and 25896 transitions. [2020-12-22 03:01:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:01:19,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-12-22 03:01:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:01:19,532 INFO L225 Difference]: With dead ends: 15858 [2020-12-22 03:01:19,533 INFO L226 Difference]: Without dead ends: 9989 [2020-12-22 03:01:19,545 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 03:01:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2020-12-22 03:01:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 9987. [2020-12-22 03:01:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9987 states. [2020-12-22 03:01:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14242 transitions. [2020-12-22 03:01:19,788 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14242 transitions. Word has length 254 [2020-12-22 03:01:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:01:19,796 INFO L481 AbstractCegarLoop]: Abstraction has 9987 states and 14242 transitions. [2020-12-22 03:01:19,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:01:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14242 transitions. [2020-12-22 03:01:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-12-22 03:01:19,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:01:19,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:01:19,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:01:19,809 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:01:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:01:19,810 INFO L82 PathProgramCache]: Analyzing trace with hash 899423828, now seen corresponding path program 1 times [2020-12-22 03:01:19,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:01:19,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941843960] [2020-12-22 03:01:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:01:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:01:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:01:21,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941843960] [2020-12-22 03:01:21,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:01:21,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:01:21,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525419667] [2020-12-22 03:01:21,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:01:21,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:01:21,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:01:21,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:01:21,009 INFO L87 Difference]: Start difference. First operand 9987 states and 14242 transitions. Second operand 4 states. [2020-12-22 03:01:36,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:01:36,926 INFO L93 Difference]: Finished difference Result 18638 states and 27136 transitions. [2020-12-22 03:01:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:01:36,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 321 [2020-12-22 03:01:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:01:36,967 INFO L225 Difference]: With dead ends: 18638 [2020-12-22 03:01:36,967 INFO L226 Difference]: Without dead ends: 9987 [2020-12-22 03:01:36,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 03:01:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2020-12-22 03:01:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9987. [2020-12-22 03:01:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9987 states. [2020-12-22 03:01:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14233 transitions. [2020-12-22 03:01:37,188 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14233 transitions. Word has length 321 [2020-12-22 03:01:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:01:37,189 INFO L481 AbstractCegarLoop]: Abstraction has 9987 states and 14233 transitions. [2020-12-22 03:01:37,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:01:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14233 transitions. [2020-12-22 03:01:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2020-12-22 03:01:37,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:01:37,203 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:01:37,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:01:37,204 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:01:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:01:37,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1627008901, now seen corresponding path program 1 times [2020-12-22 03:01:37,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:01:37,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150539677] [2020-12-22 03:01:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:01:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:01:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 55 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:01:38,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150539677] [2020-12-22 03:01:38,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849406659] [2020-12-22 03:01:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:01:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:01:39,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 03:01:39,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:01:40,227 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-22 03:01:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:01:40,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:01:40,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 03:01:40,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910103613] [2020-12-22 03:01:40,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:01:40,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:01:40,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:01:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:01:40,861 INFO L87 Difference]: Start difference. First operand 9987 states and 14233 transitions. Second operand 3 states. [2020-12-22 03:01:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:01:59,331 INFO L93 Difference]: Finished difference Result 26790 states and 39374 transitions. [2020-12-22 03:01:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:01:59,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 575 [2020-12-22 03:01:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:01:59,380 INFO L225 Difference]: With dead ends: 26790 [2020-12-22 03:01:59,380 INFO L226 Difference]: Without dead ends: 18170 [2020-12-22 03:01:59,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:01:59,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18170 states. [2020-12-22 03:01:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18170 to 18169. [2020-12-22 03:01:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18169 states. [2020-12-22 03:01:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18169 states to 18169 states and 25763 transitions. [2020-12-22 03:01:59,735 INFO L78 Accepts]: Start accepts. Automaton has 18169 states and 25763 transitions. Word has length 575 [2020-12-22 03:01:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:01:59,736 INFO L481 AbstractCegarLoop]: Abstraction has 18169 states and 25763 transitions. [2020-12-22 03:01:59,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:01:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 18169 states and 25763 transitions. [2020-12-22 03:01:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2020-12-22 03:01:59,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:01:59,753 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:01:59,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:01:59,968 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:01:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:01:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash 426069675, now seen corresponding path program 1 times [2020-12-22 03:01:59,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:01:59,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905770046] [2020-12-22 03:01:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:02:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:02:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-22 03:02:00,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905770046] [2020-12-22 03:02:00,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:02:00,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:02:00,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033910433] [2020-12-22 03:02:00,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:02:00,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:02:00,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:02:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:02:00,735 INFO L87 Difference]: Start difference. First operand 18169 states and 25763 transitions. Second operand 3 states. [2020-12-22 03:02:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:02:19,860 INFO L93 Difference]: Finished difference Result 40438 states and 57708 transitions. [2020-12-22 03:02:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:02:19,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 582 [2020-12-22 03:02:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:02:19,918 INFO L225 Difference]: With dead ends: 40438 [2020-12-22 03:02:19,919 INFO L226 Difference]: Without dead ends: 23636 [2020-12-22 03:02:19,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:02:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23636 states. [2020-12-22 03:02:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23636 to 23632. [2020-12-22 03:02:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23632 states. [2020-12-22 03:02:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23632 states to 23632 states and 31358 transitions. [2020-12-22 03:02:20,322 INFO L78 Accepts]: Start accepts. Automaton has 23632 states and 31358 transitions. Word has length 582 [2020-12-22 03:02:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:02:20,328 INFO L481 AbstractCegarLoop]: Abstraction has 23632 states and 31358 transitions. [2020-12-22 03:02:20,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:02:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 23632 states and 31358 transitions. [2020-12-22 03:02:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2020-12-22 03:02:20,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:02:20,334 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:02:20,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 03:02:20,336 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:02:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:02:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash 760598362, now seen corresponding path program 1 times [2020-12-22 03:02:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:02:20,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353894116] [2020-12-22 03:02:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:02:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:02:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 33 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:02:23,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353894116] [2020-12-22 03:02:23,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620373259] [2020-12-22 03:02:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:02:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:02:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 03:02:23,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:02:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 03:02:24,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:02:24,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-12-22 03:02:24,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454298853] [2020-12-22 03:02:24,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:02:24,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:02:24,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:02:24,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:02:24,876 INFO L87 Difference]: Start difference. First operand 23632 states and 31358 transitions. Second operand 3 states. [2020-12-22 03:02:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:02:48,348 INFO L93 Difference]: Finished difference Result 67768 states and 90825 transitions. [2020-12-22 03:02:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:02:48,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 588 [2020-12-22 03:02:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:02:48,422 INFO L225 Difference]: With dead ends: 67768 [2020-12-22 03:02:48,422 INFO L226 Difference]: Without dead ends: 45503 [2020-12-22 03:02:48,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:02:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45503 states. [2020-12-22 03:02:49,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45503 to 45491. [2020-12-22 03:02:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45491 states. [2020-12-22 03:02:49,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45491 states to 45491 states and 57469 transitions. [2020-12-22 03:02:49,102 INFO L78 Accepts]: Start accepts. Automaton has 45491 states and 57469 transitions. Word has length 588 [2020-12-22 03:02:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:02:49,103 INFO L481 AbstractCegarLoop]: Abstraction has 45491 states and 57469 transitions. [2020-12-22 03:02:49,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:02:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand 45491 states and 57469 transitions. [2020-12-22 03:02:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2020-12-22 03:02:49,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:02:49,110 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:02:49,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:02:49,320 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:02:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:02:49,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1405829479, now seen corresponding path program 1 times [2020-12-22 03:02:49,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:02:49,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130907951] [2020-12-22 03:02:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:02:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:02:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-12-22 03:02:50,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130907951] [2020-12-22 03:02:50,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:02:50,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:02:50,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163342424] [2020-12-22 03:02:50,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:02:50,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:02:50,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:02:50,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:02:50,441 INFO L87 Difference]: Start difference. First operand 45491 states and 57469 transitions. Second operand 3 states. [2020-12-22 03:03:19,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:03:19,206 INFO L93 Difference]: Finished difference Result 130766 states and 165830 transitions. [2020-12-22 03:03:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:03:19,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 613 [2020-12-22 03:03:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:03:19,353 INFO L225 Difference]: With dead ends: 130766 [2020-12-22 03:03:19,354 INFO L226 Difference]: Without dead ends: 86642 [2020-12-22 03:03:19,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:03:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86642 states. [2020-12-22 03:03:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86642 to 78435. [2020-12-22 03:03:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78435 states. [2020-12-22 03:03:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78435 states to 78435 states and 92964 transitions. [2020-12-22 03:03:21,337 INFO L78 Accepts]: Start accepts. Automaton has 78435 states and 92964 transitions. Word has length 613 [2020-12-22 03:03:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:03:21,338 INFO L481 AbstractCegarLoop]: Abstraction has 78435 states and 92964 transitions. [2020-12-22 03:03:21,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:03:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 78435 states and 92964 transitions. [2020-12-22 03:03:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 905 [2020-12-22 03:03:21,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:03:21,351 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:03:21,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 03:03:21,352 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:03:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:03:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1238738489, now seen corresponding path program 1 times [2020-12-22 03:03:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:03:21,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483556924] [2020-12-22 03:03:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:03:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:03:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 34 proven. 420 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-12-22 03:03:24,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483556924] [2020-12-22 03:03:24,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443915458] [2020-12-22 03:03:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:03:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:03:24,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 03:03:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:03:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-12-22 03:03:28,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:03:28,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 03:03:28,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454483476] [2020-12-22 03:03:28,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:03:28,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:03:28,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:03:28,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:03:28,358 INFO L87 Difference]: Start difference. First operand 78435 states and 92964 transitions. Second operand 3 states. [2020-12-22 03:04:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:04:01,047 INFO L93 Difference]: Finished difference Result 175985 states and 211689 transitions. [2020-12-22 03:04:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:04:01,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 904 [2020-12-22 03:04:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:04:01,222 INFO L225 Difference]: With dead ends: 175985 [2020-12-22 03:04:01,222 INFO L226 Difference]: Without dead ends: 98917 [2020-12-22 03:04:01,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:04:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98917 states. [2020-12-22 03:04:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98917 to 94812. [2020-12-22 03:04:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94812 states. [2020-12-22 03:04:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94812 states to 94812 states and 112918 transitions. [2020-12-22 03:04:02,756 INFO L78 Accepts]: Start accepts. Automaton has 94812 states and 112918 transitions. Word has length 904 [2020-12-22 03:04:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:04:02,757 INFO L481 AbstractCegarLoop]: Abstraction has 94812 states and 112918 transitions. [2020-12-22 03:04:02,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:04:02,757 INFO L276 IsEmpty]: Start isEmpty. Operand 94812 states and 112918 transitions. [2020-12-22 03:04:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2020-12-22 03:04:03,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:04:03,331 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:03,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:04:03,546 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:04:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:04:03,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1192982135, now seen corresponding path program 1 times [2020-12-22 03:04:03,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:04:03,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465749010] [2020-12-22 03:04:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:04:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:04:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-12-22 03:04:04,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465749010] [2020-12-22 03:04:04,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:04:04,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:04:04,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932108782] [2020-12-22 03:04:04,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:04:04,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:04:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:04:04,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:04:04,798 INFO L87 Difference]: Start difference. First operand 94812 states and 112918 transitions. Second operand 3 states.